https://developers.google.com/protocol-buffers/protobuf-java/: Core Protocol Buffers library. Protocol Buffers are a way of encoding structured data in an efficient yet extensible format. 
public class com.google.protobuf.ExtensionRegistry extends com.google.protobuf.ExtensionRegistryLite
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.google.protobuf.ExtensionRegistry
  super_class: com.google.protobuf.ExtensionRegistryLite
{
  private final java.util.Map<java.lang.String, com.google.protobuf.ExtensionRegistry$ExtensionInfo> immutableExtensionsByName;
    descriptor: Ljava/util/Map;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/Map<Ljava/lang/String;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;

  private final java.util.Map<java.lang.String, com.google.protobuf.ExtensionRegistry$ExtensionInfo> mutableExtensionsByName;
    descriptor: Ljava/util/Map;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/Map<Ljava/lang/String;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;

  private final java.util.Map<com.google.protobuf.ExtensionRegistry$DescriptorIntPair, com.google.protobuf.ExtensionRegistry$ExtensionInfo> immutableExtensionsByNumber;
    descriptor: Ljava/util/Map;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/Map<Lcom/google/protobuf/ExtensionRegistry$DescriptorIntPair;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;

  private final java.util.Map<com.google.protobuf.ExtensionRegistry$DescriptorIntPair, com.google.protobuf.ExtensionRegistry$ExtensionInfo> mutableExtensionsByNumber;
    descriptor: Ljava/util/Map;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/Map<Lcom/google/protobuf/ExtensionRegistry$DescriptorIntPair;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;

  static final com.google.protobuf.ExtensionRegistry EMPTY_REGISTRY;
    descriptor: Lcom/google/protobuf/ExtensionRegistry;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  private static volatile int[] $SWITCH_TABLE$com$google$protobuf$Extension$ExtensionType;
    descriptor: [I
    flags: (0x104a) ACC_PRIVATE, ACC_STATIC, ACC_VOLATILE, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=3, locals=0, args_size=0
         0: .line 299
            new com.google.protobuf.ExtensionRegistry
            dup
            iconst_1
            invokespecial com.google.protobuf.ExtensionRegistry.<init>:(Z)V
            putstatic com.google.protobuf.ExtensionRegistry.EMPTY_REGISTRY:Lcom/google/protobuf/ExtensionRegistry;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static com.google.protobuf.ExtensionRegistry newInstance();
    descriptor: ()Lcom/google/protobuf/ExtensionRegistry;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 94
            new com.google.protobuf.ExtensionRegistry
            dup
            invokespecial com.google.protobuf.ExtensionRegistry.<init>:()V
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static com.google.protobuf.ExtensionRegistry getEmptyRegistry();
    descriptor: ()Lcom/google/protobuf/ExtensionRegistry;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 99
            getstatic com.google.protobuf.ExtensionRegistry.EMPTY_REGISTRY:Lcom/google/protobuf/ExtensionRegistry;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public com.google.protobuf.ExtensionRegistry getUnmodifiable();
    descriptor: ()Lcom/google/protobuf/ExtensionRegistry;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.google.protobuf.ExtensionRegistry this
         0: .line 106
            new com.google.protobuf.ExtensionRegistry
            dup
            aload 0 /* this */
            invokespecial com.google.protobuf.ExtensionRegistry.<init>:(Lcom/google/protobuf/ExtensionRegistry;)V
            areturn
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/protobuf/ExtensionRegistry;

  public com.google.protobuf.ExtensionRegistry$ExtensionInfo findExtensionByName(java.lang.String);
    descriptor: (Ljava/lang/String;)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // java.lang.String fullName
         0: .line 134
            aload 0 /* this */
            aload 1 /* fullName */
            invokevirtual com.google.protobuf.ExtensionRegistry.findImmutableExtensionByName:(Ljava/lang/String;)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
            areturn
        end local 1 // java.lang.String fullName
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Lcom/google/protobuf/ExtensionRegistry;
            0    1     1  fullName  Ljava/lang/String;
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()
    MethodParameters:
          Name  Flags
      fullName  final

  public com.google.protobuf.ExtensionRegistry$ExtensionInfo findImmutableExtensionByName(java.lang.String);
    descriptor: (Ljava/lang/String;)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // java.lang.String fullName
         0: .line 144
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByName:Ljava/util/Map;
            aload 1 /* fullName */
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.google.protobuf.ExtensionRegistry$ExtensionInfo
            areturn
        end local 1 // java.lang.String fullName
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Lcom/google/protobuf/ExtensionRegistry;
            0    1     1  fullName  Ljava/lang/String;
    MethodParameters:
          Name  Flags
      fullName  final

  public com.google.protobuf.ExtensionRegistry$ExtensionInfo findMutableExtensionByName(java.lang.String);
    descriptor: (Ljava/lang/String;)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // java.lang.String fullName
         0: .line 154
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByName:Ljava/util/Map;
            aload 1 /* fullName */
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.google.protobuf.ExtensionRegistry$ExtensionInfo
            areturn
        end local 1 // java.lang.String fullName
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Lcom/google/protobuf/ExtensionRegistry;
            0    1     1  fullName  Ljava/lang/String;
    MethodParameters:
          Name  Flags
      fullName  final

  public com.google.protobuf.ExtensionRegistry$ExtensionInfo findExtensionByNumber(com.google.protobuf.Descriptors$Descriptor, int);
    descriptor: (Lcom/google/protobuf/Descriptors$Descriptor;I)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // com.google.protobuf.Descriptors$Descriptor containingType
        start local 2 // int fieldNumber
         0: .line 161
            aload 0 /* this */
            aload 1 /* containingType */
            iload 2 /* fieldNumber */
            invokevirtual com.google.protobuf.ExtensionRegistry.findImmutableExtensionByNumber:(Lcom/google/protobuf/Descriptors$Descriptor;I)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
            areturn
        end local 2 // int fieldNumber
        end local 1 // com.google.protobuf.Descriptors$Descriptor containingType
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    1     0            this  Lcom/google/protobuf/ExtensionRegistry;
            0    1     1  containingType  Lcom/google/protobuf/Descriptors$Descriptor;
            0    1     2     fieldNumber  I
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()
    MethodParameters:
                Name  Flags
      containingType  final
      fieldNumber     final

  public com.google.protobuf.ExtensionRegistry$ExtensionInfo findImmutableExtensionByNumber(com.google.protobuf.Descriptors$Descriptor, int);
    descriptor: (Lcom/google/protobuf/Descriptors$Descriptor;I)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // com.google.protobuf.Descriptors$Descriptor containingType
        start local 2 // int fieldNumber
         0: .line 171
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByNumber:Ljava/util/Map;
            new com.google.protobuf.ExtensionRegistry$DescriptorIntPair
            dup
            aload 1 /* containingType */
            iload 2 /* fieldNumber */
            invokespecial com.google.protobuf.ExtensionRegistry$DescriptorIntPair.<init>:(Lcom/google/protobuf/Descriptors$Descriptor;I)V
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.google.protobuf.ExtensionRegistry$ExtensionInfo
            areturn
        end local 2 // int fieldNumber
        end local 1 // com.google.protobuf.Descriptors$Descriptor containingType
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    1     0            this  Lcom/google/protobuf/ExtensionRegistry;
            0    1     1  containingType  Lcom/google/protobuf/Descriptors$Descriptor;
            0    1     2     fieldNumber  I
    MethodParameters:
                Name  Flags
      containingType  final
      fieldNumber     final

  public com.google.protobuf.ExtensionRegistry$ExtensionInfo findMutableExtensionByNumber(com.google.protobuf.Descriptors$Descriptor, int);
    descriptor: (Lcom/google/protobuf/Descriptors$Descriptor;I)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // com.google.protobuf.Descriptors$Descriptor containingType
        start local 2 // int fieldNumber
         0: .line 181
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByNumber:Ljava/util/Map;
            new com.google.protobuf.ExtensionRegistry$DescriptorIntPair
            dup
            aload 1 /* containingType */
            iload 2 /* fieldNumber */
            invokespecial com.google.protobuf.ExtensionRegistry$DescriptorIntPair.<init>:(Lcom/google/protobuf/Descriptors$Descriptor;I)V
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.google.protobuf.ExtensionRegistry$ExtensionInfo
            areturn
        end local 2 // int fieldNumber
        end local 1 // com.google.protobuf.Descriptors$Descriptor containingType
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot            Name  Signature
            0    1     0            this  Lcom/google/protobuf/ExtensionRegistry;
            0    1     1  containingType  Lcom/google/protobuf/Descriptors$Descriptor;
            0    1     2     fieldNumber  I
    MethodParameters:
                Name  Flags
      containingType  final
      fieldNumber     final

  public java.util.Set<com.google.protobuf.ExtensionRegistry$ExtensionInfo> getAllMutableExtensionsByExtendedType(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/util/Set;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=5, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // java.lang.String fullName
         0: .line 191
            new java.util.HashSet
            dup
            invokespecial java.util.HashSet.<init>:()V
            astore 2 /* extensions */
        start local 2 // java.util.HashSet extensions
         1: .line 192
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByNumber:Ljava/util/Map;
            invokeinterface java.util.Map.keySet:()Ljava/util/Set;
            invokeinterface java.util.Set.iterator:()Ljava/util/Iterator;
            astore 4
            goto 5
      StackMap locals: com.google.protobuf.ExtensionRegistry java.lang.String java.util.HashSet top java.util.Iterator
      StackMap stack:
         2: aload 4
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast com.google.protobuf.ExtensionRegistry$DescriptorIntPair
            astore 3 /* pair */
        start local 3 // com.google.protobuf.ExtensionRegistry$DescriptorIntPair pair
         3: .line 193
            aload 3 /* pair */
            getfield com.google.protobuf.ExtensionRegistry$DescriptorIntPair.descriptor:Lcom/google/protobuf/Descriptors$Descriptor;
            invokevirtual com.google.protobuf.Descriptors$Descriptor.getFullName:()Ljava/lang/String;
            aload 1 /* fullName */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 5
         4: .line 194
            aload 2 /* extensions */
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByNumber:Ljava/util/Map;
            aload 3 /* pair */
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.google.protobuf.ExtensionRegistry$ExtensionInfo
            invokevirtual java.util.HashSet.add:(Ljava/lang/Object;)Z
            pop
        end local 3 // com.google.protobuf.ExtensionRegistry$DescriptorIntPair pair
         5: .line 192
      StackMap locals:
      StackMap stack:
            aload 4
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 2
         6: .line 197
            aload 2 /* extensions */
            areturn
        end local 2 // java.util.HashSet extensions
        end local 1 // java.lang.String fullName
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    7     0        this  Lcom/google/protobuf/ExtensionRegistry;
            0    7     1    fullName  Ljava/lang/String;
            1    7     2  extensions  Ljava/util/HashSet<Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
            3    5     3        pair  Lcom/google/protobuf/ExtensionRegistry$DescriptorIntPair;
    Signature: (Ljava/lang/String;)Ljava/util/Set<Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
    MethodParameters:
          Name  Flags
      fullName  final

  public java.util.Set<com.google.protobuf.ExtensionRegistry$ExtensionInfo> getAllImmutableExtensionsByExtendedType(java.lang.String);
    descriptor: (Ljava/lang/String;)Ljava/util/Set;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=5, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // java.lang.String fullName
         0: .line 208
            new java.util.HashSet
            dup
            invokespecial java.util.HashSet.<init>:()V
            astore 2 /* extensions */
        start local 2 // java.util.HashSet extensions
         1: .line 209
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByNumber:Ljava/util/Map;
            invokeinterface java.util.Map.keySet:()Ljava/util/Set;
            invokeinterface java.util.Set.iterator:()Ljava/util/Iterator;
            astore 4
            goto 5
      StackMap locals: com.google.protobuf.ExtensionRegistry java.lang.String java.util.HashSet top java.util.Iterator
      StackMap stack:
         2: aload 4
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast com.google.protobuf.ExtensionRegistry$DescriptorIntPair
            astore 3 /* pair */
        start local 3 // com.google.protobuf.ExtensionRegistry$DescriptorIntPair pair
         3: .line 210
            aload 3 /* pair */
            getfield com.google.protobuf.ExtensionRegistry$DescriptorIntPair.descriptor:Lcom/google/protobuf/Descriptors$Descriptor;
            invokevirtual com.google.protobuf.Descriptors$Descriptor.getFullName:()Ljava/lang/String;
            aload 1 /* fullName */
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 5
         4: .line 211
            aload 2 /* extensions */
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByNumber:Ljava/util/Map;
            aload 3 /* pair */
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.google.protobuf.ExtensionRegistry$ExtensionInfo
            invokevirtual java.util.HashSet.add:(Ljava/lang/Object;)Z
            pop
        end local 3 // com.google.protobuf.ExtensionRegistry$DescriptorIntPair pair
         5: .line 209
      StackMap locals:
      StackMap stack:
            aload 4
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 2
         6: .line 214
            aload 2 /* extensions */
            areturn
        end local 2 // java.util.HashSet extensions
        end local 1 // java.lang.String fullName
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    7     0        this  Lcom/google/protobuf/ExtensionRegistry;
            0    7     1    fullName  Ljava/lang/String;
            1    7     2  extensions  Ljava/util/HashSet<Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
            3    5     3        pair  Lcom/google/protobuf/ExtensionRegistry$DescriptorIntPair;
    Signature: (Ljava/lang/String;)Ljava/util/Set<Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
    MethodParameters:
          Name  Flags
      fullName  final

  public void add(com.google.protobuf.Extension<?, ?>);
    descriptor: (Lcom/google/protobuf/Extension;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // com.google.protobuf.Extension extension
         0: .line 219
            aload 1 /* extension */
            invokevirtual com.google.protobuf.Extension.getExtensionType:()Lcom/google/protobuf/Extension$ExtensionType;
            getstatic com.google.protobuf.Extension$ExtensionType.IMMUTABLE:Lcom/google/protobuf/Extension$ExtensionType;
            if_acmpeq 3
         1: .line 220
            aload 1 /* extension */
            invokevirtual com.google.protobuf.Extension.getExtensionType:()Lcom/google/protobuf/Extension$ExtensionType;
            getstatic com.google.protobuf.Extension$ExtensionType.MUTABLE:Lcom/google/protobuf/Extension$ExtensionType;
            if_acmpeq 3
         2: .line 222
            return
         3: .line 224
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            aload 1 /* extension */
            invokestatic com.google.protobuf.ExtensionRegistry.newExtensionInfo:(Lcom/google/protobuf/Extension;)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
            aload 1 /* extension */
            invokevirtual com.google.protobuf.Extension.getExtensionType:()Lcom/google/protobuf/Extension$ExtensionType;
            invokevirtual com.google.protobuf.ExtensionRegistry.add:(Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;Lcom/google/protobuf/Extension$ExtensionType;)V
         4: .line 225
            return
        end local 1 // com.google.protobuf.Extension extension
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    5     0       this  Lcom/google/protobuf/ExtensionRegistry;
            0    5     1  extension  Lcom/google/protobuf/Extension<**>;
    Signature: (Lcom/google/protobuf/Extension<**>;)V
    MethodParameters:
           Name  Flags
      extension  final

  public void add(com.google.protobuf.GeneratedMessage$GeneratedExtension<?, ?>);
    descriptor: (Lcom/google/protobuf/GeneratedMessage$GeneratedExtension;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // com.google.protobuf.GeneratedMessage$GeneratedExtension extension
         0: .line 229
            aload 0 /* this */
            aload 1 /* extension */
            invokevirtual com.google.protobuf.ExtensionRegistry.add:(Lcom/google/protobuf/Extension;)V
         1: .line 230
            return
        end local 1 // com.google.protobuf.GeneratedMessage$GeneratedExtension extension
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    2     0       this  Lcom/google/protobuf/ExtensionRegistry;
            0    2     1  extension  Lcom/google/protobuf/GeneratedMessage$GeneratedExtension<**>;
    Signature: (Lcom/google/protobuf/GeneratedMessage$GeneratedExtension<**>;)V
    MethodParameters:
           Name  Flags
      extension  final

  static com.google.protobuf.ExtensionRegistry$ExtensionInfo newExtensionInfo(com.google.protobuf.Extension<?, ?>);
    descriptor: (Lcom/google/protobuf/Extension;)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
    flags: (0x0008) ACC_STATIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // com.google.protobuf.Extension extension
         0: .line 233
            aload 0 /* extension */
            invokevirtual com.google.protobuf.Extension.getDescriptor:()Lcom/google/protobuf/Descriptors$FieldDescriptor;
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getJavaType:()Lcom/google/protobuf/Descriptors$FieldDescriptor$JavaType;
            getstatic com.google.protobuf.Descriptors$FieldDescriptor$JavaType.MESSAGE:Lcom/google/protobuf/Descriptors$FieldDescriptor$JavaType;
            if_acmpne 10
         1: .line 234
            aload 0 /* extension */
            invokevirtual com.google.protobuf.Extension.getMessageDefaultInstance:()Lcom/google/protobuf/Message;
            ifnonnull 7
         2: .line 235
            new java.lang.IllegalStateException
            dup
         3: .line 236
            new java.lang.StringBuilder
            dup
            ldc "Registered message-type extension had null default instance: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
         4: .line 237
            aload 0 /* extension */
            invokevirtual com.google.protobuf.Extension.getDescriptor:()Lcom/google/protobuf/Descriptors$FieldDescriptor;
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getFullName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
         5: .line 236
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         6: .line 235
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
         7: .line 239
      StackMap locals:
      StackMap stack:
            new com.google.protobuf.ExtensionRegistry$ExtensionInfo
            dup
         8: .line 240
            aload 0 /* extension */
            invokevirtual com.google.protobuf.Extension.getDescriptor:()Lcom/google/protobuf/Descriptors$FieldDescriptor;
            aload 0 /* extension */
            invokevirtual com.google.protobuf.Extension.getMessageDefaultInstance:()Lcom/google/protobuf/Message;
         9: .line 239
            invokespecial com.google.protobuf.ExtensionRegistry$ExtensionInfo.<init>:(Lcom/google/protobuf/Descriptors$FieldDescriptor;Lcom/google/protobuf/Message;)V
            areturn
        10: .line 242
      StackMap locals:
      StackMap stack:
            new com.google.protobuf.ExtensionRegistry$ExtensionInfo
            dup
            aload 0 /* extension */
            invokevirtual com.google.protobuf.Extension.getDescriptor:()Lcom/google/protobuf/Descriptors$FieldDescriptor;
            aconst_null
            invokespecial com.google.protobuf.ExtensionRegistry$ExtensionInfo.<init>:(Lcom/google/protobuf/Descriptors$FieldDescriptor;Lcom/google/protobuf/Message;)V
            areturn
        end local 0 // com.google.protobuf.Extension extension
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   11     0  extension  Lcom/google/protobuf/Extension<**>;
    Signature: (Lcom/google/protobuf/Extension<**>;)Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
    MethodParameters:
           Name  Flags
      extension  final

  public void add(com.google.protobuf.Descriptors$FieldDescriptor);
    descriptor: (Lcom/google/protobuf/Descriptors$FieldDescriptor;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=3, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // com.google.protobuf.Descriptors$FieldDescriptor type
         0: .line 248
            aload 1 /* type */
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getJavaType:()Lcom/google/protobuf/Descriptors$FieldDescriptor$JavaType;
            getstatic com.google.protobuf.Descriptors$FieldDescriptor$JavaType.MESSAGE:Lcom/google/protobuf/Descriptors$FieldDescriptor$JavaType;
            if_acmpne 4
         1: .line 249
            new java.lang.IllegalArgumentException
            dup
         2: .line 250
            ldc "ExtensionRegistry.add() must be provided a default instance when adding an embedded message extension."
         3: .line 249
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 253
      StackMap locals:
      StackMap stack:
            new com.google.protobuf.ExtensionRegistry$ExtensionInfo
            dup
            aload 1 /* type */
            aconst_null
            invokespecial com.google.protobuf.ExtensionRegistry$ExtensionInfo.<init>:(Lcom/google/protobuf/Descriptors$FieldDescriptor;Lcom/google/protobuf/Message;)V
            astore 2 /* info */
        start local 2 // com.google.protobuf.ExtensionRegistry$ExtensionInfo info
         5: .line 254
            aload 0 /* this */
            aload 2 /* info */
            getstatic com.google.protobuf.Extension$ExtensionType.IMMUTABLE:Lcom/google/protobuf/Extension$ExtensionType;
            invokevirtual com.google.protobuf.ExtensionRegistry.add:(Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;Lcom/google/protobuf/Extension$ExtensionType;)V
         6: .line 255
            aload 0 /* this */
            aload 2 /* info */
            getstatic com.google.protobuf.Extension$ExtensionType.MUTABLE:Lcom/google/protobuf/Extension$ExtensionType;
            invokevirtual com.google.protobuf.ExtensionRegistry.add:(Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;Lcom/google/protobuf/Extension$ExtensionType;)V
         7: .line 256
            return
        end local 2 // com.google.protobuf.ExtensionRegistry$ExtensionInfo info
        end local 1 // com.google.protobuf.Descriptors$FieldDescriptor type
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    8     0  this  Lcom/google/protobuf/ExtensionRegistry;
            0    8     1  type  Lcom/google/protobuf/Descriptors$FieldDescriptor;
            5    8     2  info  Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
    MethodParameters:
      Name  Flags
      type  final

  public void add(com.google.protobuf.Descriptors$FieldDescriptor, com.google.protobuf.Message);
    descriptor: (Lcom/google/protobuf/Descriptors$FieldDescriptor;Lcom/google/protobuf/Message;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // com.google.protobuf.Descriptors$FieldDescriptor type
        start local 2 // com.google.protobuf.Message defaultInstance
         0: .line 260
            aload 1 /* type */
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getJavaType:()Lcom/google/protobuf/Descriptors$FieldDescriptor$JavaType;
            getstatic com.google.protobuf.Descriptors$FieldDescriptor$JavaType.MESSAGE:Lcom/google/protobuf/Descriptors$FieldDescriptor$JavaType;
            if_acmpeq 4
         1: .line 261
            new java.lang.IllegalArgumentException
            dup
         2: .line 262
            ldc "ExtensionRegistry.add() provided a default instance for a non-message extension."
         3: .line 261
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 264
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            new com.google.protobuf.ExtensionRegistry$ExtensionInfo
            dup
            aload 1 /* type */
            aload 2 /* defaultInstance */
            invokespecial com.google.protobuf.ExtensionRegistry$ExtensionInfo.<init>:(Lcom/google/protobuf/Descriptors$FieldDescriptor;Lcom/google/protobuf/Message;)V
            getstatic com.google.protobuf.Extension$ExtensionType.IMMUTABLE:Lcom/google/protobuf/Extension$ExtensionType;
            invokevirtual com.google.protobuf.ExtensionRegistry.add:(Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;Lcom/google/protobuf/Extension$ExtensionType;)V
         5: .line 265
            return
        end local 2 // com.google.protobuf.Message defaultInstance
        end local 1 // com.google.protobuf.Descriptors$FieldDescriptor type
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    6     0             this  Lcom/google/protobuf/ExtensionRegistry;
            0    6     1             type  Lcom/google/protobuf/Descriptors$FieldDescriptor;
            0    6     2  defaultInstance  Lcom/google/protobuf/Message;
    MethodParameters:
                 Name  Flags
      type             final
      defaultInstance  final

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.google.protobuf.ExtensionRegistry this
         0: .line 270
            aload 0 /* this */
            invokespecial com.google.protobuf.ExtensionRegistryLite.<init>:()V
         1: .line 271
            aload 0 /* this */
            new java.util.HashMap
            dup
            invokespecial java.util.HashMap.<init>:()V
            putfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByName:Ljava/util/Map;
         2: .line 272
            aload 0 /* this */
            new java.util.HashMap
            dup
            invokespecial java.util.HashMap.<init>:()V
            putfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByName:Ljava/util/Map;
         3: .line 273
            aload 0 /* this */
            new java.util.HashMap
            dup
            invokespecial java.util.HashMap.<init>:()V
            putfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByNumber:Ljava/util/Map;
         4: .line 274
            aload 0 /* this */
            new java.util.HashMap
            dup
            invokespecial java.util.HashMap.<init>:()V
            putfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByNumber:Ljava/util/Map;
         5: .line 275
            return
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lcom/google/protobuf/ExtensionRegistry;

  private void <init>(com.google.protobuf.ExtensionRegistry);
    descriptor: (Lcom/google/protobuf/ExtensionRegistry;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // com.google.protobuf.ExtensionRegistry other
         0: .line 278
            aload 0 /* this */
            aload 1 /* other */
            invokespecial com.google.protobuf.ExtensionRegistryLite.<init>:(Lcom/google/protobuf/ExtensionRegistryLite;)V
         1: .line 279
            aload 0 /* this */
            aload 1 /* other */
            getfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByName:Ljava/util/Map;
            invokestatic java.util.Collections.unmodifiableMap:(Ljava/util/Map;)Ljava/util/Map;
            putfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByName:Ljava/util/Map;
         2: .line 280
            aload 0 /* this */
            aload 1 /* other */
            getfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByName:Ljava/util/Map;
            invokestatic java.util.Collections.unmodifiableMap:(Ljava/util/Map;)Ljava/util/Map;
            putfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByName:Ljava/util/Map;
         3: .line 281
            aload 0 /* this */
         4: .line 282
            aload 1 /* other */
            getfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByNumber:Ljava/util/Map;
            invokestatic java.util.Collections.unmodifiableMap:(Ljava/util/Map;)Ljava/util/Map;
         5: .line 281
            putfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByNumber:Ljava/util/Map;
         6: .line 283
            aload 0 /* this */
            aload 1 /* other */
            getfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByNumber:Ljava/util/Map;
            invokestatic java.util.Collections.unmodifiableMap:(Ljava/util/Map;)Ljava/util/Map;
            putfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByNumber:Ljava/util/Map;
         7: .line 284
            return
        end local 1 // com.google.protobuf.ExtensionRegistry other
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    8     0   this  Lcom/google/protobuf/ExtensionRegistry;
            0    8     1  other  Lcom/google/protobuf/ExtensionRegistry;
    MethodParameters:
       Name  Flags
      other  

  void <init>(boolean);
    descriptor: (Z)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // boolean empty
         0: .line 292
            aload 0 /* this */
            getstatic com.google.protobuf.ExtensionRegistry.EMPTY_REGISTRY_LITE:Lcom/google/protobuf/ExtensionRegistryLite;
            invokespecial com.google.protobuf.ExtensionRegistryLite.<init>:(Lcom/google/protobuf/ExtensionRegistryLite;)V
         1: .line 293
            aload 0 /* this */
            invokestatic java.util.Collections.emptyMap:()Ljava/util/Map;
            putfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByName:Ljava/util/Map;
         2: .line 294
            aload 0 /* this */
            invokestatic java.util.Collections.emptyMap:()Ljava/util/Map;
            putfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByName:Ljava/util/Map;
         3: .line 295
            aload 0 /* this */
            invokestatic java.util.Collections.emptyMap:()Ljava/util/Map;
            putfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByNumber:Ljava/util/Map;
         4: .line 296
            aload 0 /* this */
            invokestatic java.util.Collections.emptyMap:()Ljava/util/Map;
            putfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByNumber:Ljava/util/Map;
         5: .line 297
            return
        end local 1 // boolean empty
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    6     0   this  Lcom/google/protobuf/ExtensionRegistry;
            0    6     1  empty  Z
    MethodParameters:
       Name  Flags
      empty  

  private void add(com.google.protobuf.ExtensionRegistry$ExtensionInfo, com.google.protobuf.Extension$ExtensionType);
    descriptor: (Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;Lcom/google/protobuf/Extension$ExtensionType;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=6, args_size=3
        start local 0 // com.google.protobuf.ExtensionRegistry this
        start local 1 // com.google.protobuf.ExtensionRegistry$ExtensionInfo extension
        start local 2 // com.google.protobuf.Extension$ExtensionType extensionType
         0: .line 302
            aload 1 /* extension */
            getfield com.google.protobuf.ExtensionRegistry$ExtensionInfo.descriptor:Lcom/google/protobuf/Descriptors$FieldDescriptor;
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.isExtension:()Z
            ifne 4
         1: .line 303
            new java.lang.IllegalArgumentException
            dup
         2: .line 304
            ldc "ExtensionRegistry.add() was given a FieldDescriptor for a regular (non-extension) field."
         3: .line 303
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         4: .line 310
      StackMap locals:
      StackMap stack:
            invokestatic com.google.protobuf.ExtensionRegistry.$SWITCH_TABLE$com$google$protobuf$Extension$ExtensionType:()[I
            aload 2 /* extensionType */
            invokevirtual com.google.protobuf.Extension$ExtensionType.ordinal:()I
            iaload
            tableswitch { // 1 - 2
                    1: 5
                    2: 8
              default: 11
          }
         5: .line 312
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByName:Ljava/util/Map;
            astore 3 /* extensionsByName */
        start local 3 // java.util.Map extensionsByName
         6: .line 313
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.immutableExtensionsByNumber:Ljava/util/Map;
            astore 4 /* extensionsByNumber */
        start local 4 // java.util.Map extensionsByNumber
         7: .line 314
            goto 12
        end local 4 // java.util.Map extensionsByNumber
        end local 3 // java.util.Map extensionsByName
         8: .line 316
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByName:Ljava/util/Map;
            astore 3 /* extensionsByName */
        start local 3 // java.util.Map extensionsByName
         9: .line 317
            aload 0 /* this */
            getfield com.google.protobuf.ExtensionRegistry.mutableExtensionsByNumber:Ljava/util/Map;
            astore 4 /* extensionsByNumber */
        start local 4 // java.util.Map extensionsByNumber
        10: .line 318
            goto 12
        end local 4 // java.util.Map extensionsByNumber
        end local 3 // java.util.Map extensionsByName
        11: .line 321
      StackMap locals:
      StackMap stack:
            return
        start local 3 // java.util.Map extensionsByName
        start local 4 // java.util.Map extensionsByNumber
        12: .line 324
      StackMap locals: java.util.Map java.util.Map
      StackMap stack:
            aload 3 /* extensionsByName */
            aload 1 /* extension */
            getfield com.google.protobuf.ExtensionRegistry$ExtensionInfo.descriptor:Lcom/google/protobuf/Descriptors$FieldDescriptor;
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getFullName:()Ljava/lang/String;
            aload 1 /* extension */
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        13: .line 325
            aload 4 /* extensionsByNumber */
        14: .line 326
            new com.google.protobuf.ExtensionRegistry$DescriptorIntPair
            dup
        15: .line 327
            aload 1 /* extension */
            getfield com.google.protobuf.ExtensionRegistry$ExtensionInfo.descriptor:Lcom/google/protobuf/Descriptors$FieldDescriptor;
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getContainingType:()Lcom/google/protobuf/Descriptors$Descriptor;
            aload 1 /* extension */
            getfield com.google.protobuf.ExtensionRegistry$ExtensionInfo.descriptor:Lcom/google/protobuf/Descriptors$FieldDescriptor;
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getNumber:()I
        16: .line 326
            invokespecial com.google.protobuf.ExtensionRegistry$DescriptorIntPair.<init>:(Lcom/google/protobuf/Descriptors$Descriptor;I)V
        17: .line 328
            aload 1 /* extension */
        18: .line 325
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        19: .line 330
            aload 1 /* extension */
            getfield com.google.protobuf.ExtensionRegistry$ExtensionInfo.descriptor:Lcom/google/protobuf/Descriptors$FieldDescriptor;
            astore 5 /* field */
        start local 5 // com.google.protobuf.Descriptors$FieldDescriptor field
        20: .line 331
            aload 5 /* field */
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getContainingType:()Lcom/google/protobuf/Descriptors$Descriptor;
            invokevirtual com.google.protobuf.Descriptors$Descriptor.getOptions:()Lcom/google/protobuf/DescriptorProtos$MessageOptions;
            invokevirtual com.google.protobuf.DescriptorProtos$MessageOptions.getMessageSetWireFormat:()Z
            ifeq 25
        21: .line 332
            aload 5 /* field */
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getType:()Lcom/google/protobuf/Descriptors$FieldDescriptor$Type;
            getstatic com.google.protobuf.Descriptors$FieldDescriptor$Type.MESSAGE:Lcom/google/protobuf/Descriptors$FieldDescriptor$Type;
            if_acmpne 25
        22: .line 333
            aload 5 /* field */
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.isOptional:()Z
            ifeq 25
        23: .line 334
            aload 5 /* field */
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getExtensionScope:()Lcom/google/protobuf/Descriptors$Descriptor;
            aload 5 /* field */
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getMessageType:()Lcom/google/protobuf/Descriptors$Descriptor;
            if_acmpne 25
        24: .line 338
            aload 3 /* extensionsByName */
            aload 5 /* field */
            invokevirtual com.google.protobuf.Descriptors$FieldDescriptor.getMessageType:()Lcom/google/protobuf/Descriptors$Descriptor;
            invokevirtual com.google.protobuf.Descriptors$Descriptor.getFullName:()Ljava/lang/String;
            aload 1 /* extension */
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        25: .line 340
      StackMap locals: com.google.protobuf.Descriptors$FieldDescriptor
      StackMap stack:
            return
        end local 5 // com.google.protobuf.Descriptors$FieldDescriptor field
        end local 4 // java.util.Map extensionsByNumber
        end local 3 // java.util.Map extensionsByName
        end local 2 // com.google.protobuf.Extension$ExtensionType extensionType
        end local 1 // com.google.protobuf.ExtensionRegistry$ExtensionInfo extension
        end local 0 // com.google.protobuf.ExtensionRegistry this
      LocalVariableTable:
        Start  End  Slot                Name  Signature
            0   26     0                this  Lcom/google/protobuf/ExtensionRegistry;
            0   26     1           extension  Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;
            0   26     2       extensionType  Lcom/google/protobuf/Extension$ExtensionType;
            6    8     3    extensionsByName  Ljava/util/Map<Ljava/lang/String;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
            9   11     3    extensionsByName  Ljava/util/Map<Ljava/lang/String;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
           12   26     3    extensionsByName  Ljava/util/Map<Ljava/lang/String;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
            7    8     4  extensionsByNumber  Ljava/util/Map<Lcom/google/protobuf/ExtensionRegistry$DescriptorIntPair;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
           10   11     4  extensionsByNumber  Ljava/util/Map<Lcom/google/protobuf/ExtensionRegistry$DescriptorIntPair;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
           12   26     4  extensionsByNumber  Ljava/util/Map<Lcom/google/protobuf/ExtensionRegistry$DescriptorIntPair;Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;>;
           20   26     5               field  Lcom/google/protobuf/Descriptors$FieldDescriptor;
    Signature: (Lcom/google/protobuf/ExtensionRegistry$ExtensionInfo;Lcom/google/protobuf/Extension$ExtensionType;)V
    MethodParameters:
               Name  Flags
      extension      final
      extensionType  final

  public com.google.protobuf.ExtensionRegistryLite getUnmodifiable();
    descriptor: ()Lcom/google/protobuf/ExtensionRegistryLite;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual com.google.protobuf.ExtensionRegistry.getUnmodifiable:()Lcom/google/protobuf/ExtensionRegistry;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  static int[] $SWITCH_TABLE$com$google$protobuf$Extension$ExtensionType();
    descriptor: ()[I
    flags: (0x1008) ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=3, locals=1, args_size=0
         0: .line 91
            getstatic com.google.protobuf.ExtensionRegistry.$SWITCH_TABLE$com$google$protobuf$Extension$ExtensionType:[I
            dup
            ifnull 1
            areturn
      StackMap locals:
      StackMap stack: int[]
         1: pop
            invokestatic com.google.protobuf.Extension$ExtensionType.values:()[Lcom/google/protobuf/Extension$ExtensionType;
            arraylength
            newarray 10
            astore 0
         2: aload 0
            getstatic com.google.protobuf.Extension$ExtensionType.IMMUTABLE:Lcom/google/protobuf/Extension$ExtensionType;
            invokevirtual com.google.protobuf.Extension$ExtensionType.ordinal:()I
            iconst_1
            iastore
         3: goto 5
      StackMap locals: int[]
      StackMap stack: java.lang.NoSuchFieldError
         4: pop
      StackMap locals:
      StackMap stack:
         5: aload 0
            getstatic com.google.protobuf.Extension$ExtensionType.MUTABLE:Lcom/google/protobuf/Extension$ExtensionType;
            invokevirtual com.google.protobuf.Extension$ExtensionType.ordinal:()I
            iconst_2
            iastore
         6: goto 8
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
         7: pop
      StackMap locals:
      StackMap stack:
         8: aload 0
            getstatic com.google.protobuf.Extension$ExtensionType.PROTO1:Lcom/google/protobuf/Extension$ExtensionType;
            invokevirtual com.google.protobuf.Extension$ExtensionType.ordinal:()I
            iconst_3
            iastore
         9: goto 11
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        10: pop
      StackMap locals:
      StackMap stack:
        11: aload 0
            dup
            putstatic com.google.protobuf.ExtensionRegistry.$SWITCH_TABLE$com$google$protobuf$Extension$ExtensionType:[I
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
      Exception table:
        from    to  target  type
           2     3       4  Class java.lang.NoSuchFieldError
           5     6       7  Class java.lang.NoSuchFieldError
           8     9      10  Class java.lang.NoSuchFieldError
}
SourceFile: "ExtensionRegistry.java"
NestMembers:
  com.google.protobuf.ExtensionRegistry$DescriptorIntPair  com.google.protobuf.ExtensionRegistry$ExtensionInfo
InnerClasses:
  public final MessageOptions = com.google.protobuf.DescriptorProtos$MessageOptions of com.google.protobuf.DescriptorProtos
  public final Descriptor = com.google.protobuf.Descriptors$Descriptor of com.google.protobuf.Descriptors
  public final FieldDescriptor = com.google.protobuf.Descriptors$FieldDescriptor of com.google.protobuf.Descriptors
  public final JavaType = com.google.protobuf.Descriptors$FieldDescriptor$JavaType of com.google.protobuf.Descriptors$FieldDescriptor
  public final Type = com.google.protobuf.Descriptors$FieldDescriptor$Type of com.google.protobuf.Descriptors$FieldDescriptor
  protected final ExtensionType = com.google.protobuf.Extension$ExtensionType of com.google.protobuf.Extension
  private final DescriptorIntPair = com.google.protobuf.ExtensionRegistry$DescriptorIntPair of com.google.protobuf.ExtensionRegistry
  public final ExtensionInfo = com.google.protobuf.ExtensionRegistry$ExtensionInfo of com.google.protobuf.ExtensionRegistry
  public GeneratedExtension = com.google.protobuf.GeneratedMessage$GeneratedExtension of com.google.protobuf.GeneratedMessage