http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
public abstract class io.netty.util.internal.TypeParameterMatcher
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: io.netty.util.internal.TypeParameterMatcher
  super_class: java.lang.Object
{
  private static final io.netty.util.internal.TypeParameterMatcher NOOP;
    descriptor: Lio/netty/util/internal/TypeParameterMatcher;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 29
            new io.netty.util.internal.TypeParameterMatcher$1
            dup
            invokespecial io.netty.util.internal.TypeParameterMatcher$1.<init>:()V
            putstatic io.netty.util.internal.TypeParameterMatcher.NOOP:Lio/netty/util/internal/TypeParameterMatcher;
         1: .line 34
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static io.netty.util.internal.TypeParameterMatcher get(java.lang.Class<?>);
    descriptor: (Ljava/lang/Class;)Lio/netty/util/internal/TypeParameterMatcher;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=3, args_size=1
        start local 0 // java.lang.Class parameterType
         0: .line 38
            invokestatic io.netty.util.internal.InternalThreadLocalMap.get:()Lio/netty/util/internal/InternalThreadLocalMap;
            invokevirtual io.netty.util.internal.InternalThreadLocalMap.typeParameterMatcherGetCache:()Ljava/util/Map;
         1: .line 37
            astore 1 /* getCache */
        start local 1 // java.util.Map getCache
         2: .line 40
            aload 1 /* getCache */
            aload 0 /* parameterType */
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast io.netty.util.internal.TypeParameterMatcher
            astore 2 /* matcher */
        start local 2 // io.netty.util.internal.TypeParameterMatcher matcher
         3: .line 41
            aload 2 /* matcher */
            ifnonnull 9
         4: .line 42
            aload 0 /* parameterType */
            ldc Ljava/lang/Object;
            if_acmpne 7
         5: .line 43
            getstatic io.netty.util.internal.TypeParameterMatcher.NOOP:Lio/netty/util/internal/TypeParameterMatcher;
            astore 2 /* matcher */
         6: .line 44
            goto 8
         7: .line 45
      StackMap locals: java.util.Map io.netty.util.internal.TypeParameterMatcher
      StackMap stack:
            new io.netty.util.internal.TypeParameterMatcher$ReflectiveMatcher
            dup
            aload 0 /* parameterType */
            invokespecial io.netty.util.internal.TypeParameterMatcher$ReflectiveMatcher.<init>:(Ljava/lang/Class;)V
            astore 2 /* matcher */
         8: .line 47
      StackMap locals:
      StackMap stack:
            aload 1 /* getCache */
            aload 0 /* parameterType */
            aload 2 /* matcher */
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
         9: .line 50
      StackMap locals:
      StackMap stack:
            aload 2 /* matcher */
            areturn
        end local 2 // io.netty.util.internal.TypeParameterMatcher matcher
        end local 1 // java.util.Map getCache
        end local 0 // java.lang.Class parameterType
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   10     0  parameterType  Ljava/lang/Class<*>;
            2   10     1       getCache  Ljava/util/Map<Ljava/lang/Class<*>;Lio/netty/util/internal/TypeParameterMatcher;>;
            3   10     2        matcher  Lio/netty/util/internal/TypeParameterMatcher;
    Signature: (Ljava/lang/Class<*>;)Lio/netty/util/internal/TypeParameterMatcher;
    MethodParameters:
               Name  Flags
      parameterType  final

  public static io.netty.util.internal.TypeParameterMatcher find(, java.lang.Class<?>, java.lang.String);
    descriptor: (Ljava/lang/Object;Ljava/lang/Class;Ljava/lang/String;)Lio/netty/util/internal/TypeParameterMatcher;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=7, args_size=3
        start local 0 // java.lang.Object object
        start local 1 // java.lang.Class parametrizedSuperclass
        start local 2 // java.lang.String typeParamName
         0: .line 57
            invokestatic io.netty.util.internal.InternalThreadLocalMap.get:()Lio/netty/util/internal/InternalThreadLocalMap;
            invokevirtual io.netty.util.internal.InternalThreadLocalMap.typeParameterMatcherFindCache:()Ljava/util/Map;
         1: .line 56
            astore 3 /* findCache */
        start local 3 // java.util.Map findCache
         2: .line 58
            aload 0 /* object */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            astore 4 /* thisClass */
        start local 4 // java.lang.Class thisClass
         3: .line 60
            aload 3 /* findCache */
            aload 4 /* thisClass */
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.util.Map
            astore 5 /* map */
        start local 5 // java.util.Map map
         4: .line 61
            aload 5 /* map */
            ifnonnull 7
         5: .line 62
            new java.util.HashMap
            dup
            invokespecial java.util.HashMap.<init>:()V
            astore 5 /* map */
         6: .line 63
            aload 3 /* findCache */
            aload 4 /* thisClass */
            aload 5 /* map */
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
         7: .line 66
      StackMap locals: java.util.Map java.lang.Class java.util.Map
      StackMap stack:
            aload 5 /* map */
            aload 2 /* typeParamName */
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast io.netty.util.internal.TypeParameterMatcher
            astore 6 /* matcher */
        start local 6 // io.netty.util.internal.TypeParameterMatcher matcher
         8: .line 67
            aload 6 /* matcher */
            ifnonnull 11
         9: .line 68
            aload 0 /* object */
            aload 1 /* parametrizedSuperclass */
            aload 2 /* typeParamName */
            invokestatic io.netty.util.internal.TypeParameterMatcher.find0:(Ljava/lang/Object;Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Class;
            invokestatic io.netty.util.internal.TypeParameterMatcher.get:(Ljava/lang/Class;)Lio/netty/util/internal/TypeParameterMatcher;
            astore 6 /* matcher */
        10: .line 69
            aload 5 /* map */
            aload 2 /* typeParamName */
            aload 6 /* matcher */
            invokeinterface java.util.Map.put:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            pop
        11: .line 72
      StackMap locals: io.netty.util.internal.TypeParameterMatcher
      StackMap stack:
            aload 6 /* matcher */
            areturn
        end local 6 // io.netty.util.internal.TypeParameterMatcher matcher
        end local 5 // java.util.Map map
        end local 4 // java.lang.Class thisClass
        end local 3 // java.util.Map findCache
        end local 2 // java.lang.String typeParamName
        end local 1 // java.lang.Class parametrizedSuperclass
        end local 0 // java.lang.Object object
      LocalVariableTable:
        Start  End  Slot                    Name  Signature
            0   12     0                  object  Ljava/lang/Object;
            0   12     1  parametrizedSuperclass  Ljava/lang/Class<*>;
            0   12     2           typeParamName  Ljava/lang/String;
            2   12     3               findCache  Ljava/util/Map<Ljava/lang/Class<*>;Ljava/util/Map<Ljava/lang/String;Lio/netty/util/internal/TypeParameterMatcher;>;>;
            3   12     4               thisClass  Ljava/lang/Class<*>;
            4   12     5                     map  Ljava/util/Map<Ljava/lang/String;Lio/netty/util/internal/TypeParameterMatcher;>;
            8   12     6                 matcher  Lio/netty/util/internal/TypeParameterMatcher;
    Signature: (Ljava/lang/Object;Ljava/lang/Class<*>;Ljava/lang/String;)Lio/netty/util/internal/TypeParameterMatcher;
    MethodParameters:
                        Name  Flags
      object                  final
      parametrizedSuperclass  final
      typeParamName           final

  private static java.lang.Class<?> find0(, java.lang.Class<?>, java.lang.String);
    descriptor: (Ljava/lang/Object;Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Class;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=5, locals=11, args_size=3
        start local 0 // java.lang.Object object
        start local 1 // java.lang.Class parametrizedSuperclass
        start local 2 // java.lang.String typeParamName
         0: .line 78
            aload 0 /* object */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            astore 3 /* thisClass */
        start local 3 // java.lang.Class thisClass
         1: .line 79
            aload 3 /* thisClass */
            astore 4 /* currentClass */
        start local 4 // java.lang.Class currentClass
         2: .line 81
      StackMap locals: java.lang.Class java.lang.Class
      StackMap stack:
            aload 4 /* currentClass */
            invokevirtual java.lang.Class.getSuperclass:()Ljava/lang/Class;
            aload 1 /* parametrizedSuperclass */
            if_acmpne 42
         3: .line 82
            iconst_m1
            istore 5 /* typeParamIndex */
        start local 5 // int typeParamIndex
         4: .line 83
            aload 4 /* currentClass */
            invokevirtual java.lang.Class.getSuperclass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.getTypeParameters:()[Ljava/lang/reflect/TypeVariable;
            astore 6 /* typeParams */
        start local 6 // java.lang.reflect.TypeVariable[] typeParams
         5: .line 84
            iconst_0
            istore 7 /* i */
        start local 7 // int i
         6: goto 11
         7: .line 85
      StackMap locals: int java.lang.reflect.TypeVariable[] int
      StackMap stack:
            aload 2 /* typeParamName */
            aload 6 /* typeParams */
            iload 7 /* i */
            aaload
            invokeinterface java.lang.reflect.TypeVariable.getName:()Ljava/lang/String;
            invokevirtual java.lang.String.equals:(Ljava/lang/Object;)Z
            ifeq 10
         8: .line 86
            iload 7 /* i */
            istore 5 /* typeParamIndex */
         9: .line 87
            goto 12
        10: .line 84
      StackMap locals:
      StackMap stack:
            iinc 7 /* i */ 1
      StackMap locals:
      StackMap stack:
        11: iload 7 /* i */
            aload 6 /* typeParams */
            arraylength
            if_icmplt 7
        end local 7 // int i
        12: .line 91
      StackMap locals:
      StackMap stack:
            iload 5 /* typeParamIndex */
            ifge 16
        13: .line 92
            new java.lang.IllegalStateException
            dup
        14: .line 93
            new java.lang.StringBuilder
            dup
            ldc "unknown type parameter '"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 2 /* typeParamName */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc "': "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 1 /* parametrizedSuperclass */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
        15: .line 92
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
        16: .line 96
      StackMap locals:
      StackMap stack:
            aload 4 /* currentClass */
            invokevirtual java.lang.Class.getGenericSuperclass:()Ljava/lang/reflect/Type;
            astore 7 /* genericSuperType */
        start local 7 // java.lang.reflect.Type genericSuperType
        17: .line 97
            aload 7 /* genericSuperType */
            instanceof java.lang.reflect.ParameterizedType
            ifne 19
        18: .line 98
            ldc Ljava/lang/Object;
            areturn
        19: .line 101
      StackMap locals: java.lang.reflect.Type
      StackMap stack:
            aload 7 /* genericSuperType */
            checkcast java.lang.reflect.ParameterizedType
            invokeinterface java.lang.reflect.ParameterizedType.getActualTypeArguments:()[Ljava/lang/reflect/Type;
            astore 8 /* actualTypeParams */
        start local 8 // java.lang.reflect.Type[] actualTypeParams
        20: .line 103
            aload 8 /* actualTypeParams */
            iload 5 /* typeParamIndex */
            aaload
            astore 9 /* actualTypeParam */
        start local 9 // java.lang.reflect.Type actualTypeParam
        21: .line 104
            aload 9 /* actualTypeParam */
            instanceof java.lang.reflect.ParameterizedType
            ifeq 23
        22: .line 105
            aload 9 /* actualTypeParam */
            checkcast java.lang.reflect.ParameterizedType
            invokeinterface java.lang.reflect.ParameterizedType.getRawType:()Ljava/lang/reflect/Type;
            astore 9 /* actualTypeParam */
        23: .line 107
      StackMap locals: java.lang.reflect.Type[] java.lang.reflect.Type
      StackMap stack:
            aload 9 /* actualTypeParam */
            instanceof java.lang.Class
            ifeq 25
        24: .line 108
            aload 9 /* actualTypeParam */
            checkcast java.lang.Class
            areturn
        25: .line 110
      StackMap locals:
      StackMap stack:
            aload 9 /* actualTypeParam */
            instanceof java.lang.reflect.GenericArrayType
            ifeq 31
        26: .line 111
            aload 9 /* actualTypeParam */
            checkcast java.lang.reflect.GenericArrayType
            invokeinterface java.lang.reflect.GenericArrayType.getGenericComponentType:()Ljava/lang/reflect/Type;
            astore 10 /* componentType */
        start local 10 // java.lang.reflect.Type componentType
        27: .line 112
            aload 10 /* componentType */
            instanceof java.lang.reflect.ParameterizedType
            ifeq 29
        28: .line 113
            aload 10 /* componentType */
            checkcast java.lang.reflect.ParameterizedType
            invokeinterface java.lang.reflect.ParameterizedType.getRawType:()Ljava/lang/reflect/Type;
            astore 10 /* componentType */
        29: .line 115
      StackMap locals: java.lang.reflect.Type
      StackMap stack:
            aload 10 /* componentType */
            instanceof java.lang.Class
            ifeq 31
        30: .line 116
            aload 10 /* componentType */
            checkcast java.lang.Class
            iconst_0
            invokestatic java.lang.reflect.Array.newInstance:(Ljava/lang/Class;I)Ljava/lang/Object;
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            areturn
        end local 10 // java.lang.reflect.Type componentType
        31: .line 119
      StackMap locals:
      StackMap stack:
            aload 9 /* actualTypeParam */
            instanceof java.lang.reflect.TypeVariable
            ifeq 41
        32: .line 121
            aload 9 /* actualTypeParam */
            checkcast java.lang.reflect.TypeVariable
            astore 10 /* v */
        start local 10 // java.lang.reflect.TypeVariable v
        33: .line 122
            aload 3 /* thisClass */
            astore 4 /* currentClass */
        34: .line 123
            aload 10 /* v */
            invokeinterface java.lang.reflect.TypeVariable.getGenericDeclaration:()Ljava/lang/reflect/GenericDeclaration;
            instanceof java.lang.Class
            ifne 36
        35: .line 124
            ldc Ljava/lang/Object;
            areturn
        36: .line 127
      StackMap locals: java.lang.reflect.TypeVariable
      StackMap stack:
            aload 10 /* v */
            invokeinterface java.lang.reflect.TypeVariable.getGenericDeclaration:()Ljava/lang/reflect/GenericDeclaration;
            checkcast java.lang.Class
            astore 1 /* parametrizedSuperclass */
        37: .line 128
            aload 10 /* v */
            invokeinterface java.lang.reflect.TypeVariable.getName:()Ljava/lang/String;
            astore 2 /* typeParamName */
        38: .line 129
            aload 1 /* parametrizedSuperclass */
            aload 3 /* thisClass */
            invokevirtual java.lang.Class.isAssignableFrom:(Ljava/lang/Class;)Z
            ifeq 40
        39: .line 130
            goto 2
        40: .line 132
      StackMap locals:
      StackMap stack:
            ldc Ljava/lang/Object;
            areturn
        end local 10 // java.lang.reflect.TypeVariable v
        41: .line 136
      StackMap locals:
      StackMap stack:
            aload 3 /* thisClass */
            aload 2 /* typeParamName */
            invokestatic io.netty.util.internal.TypeParameterMatcher.fail:(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Class;
            areturn
        end local 9 // java.lang.reflect.Type actualTypeParam
        end local 8 // java.lang.reflect.Type[] actualTypeParams
        end local 7 // java.lang.reflect.Type genericSuperType
        end local 6 // java.lang.reflect.TypeVariable[] typeParams
        end local 5 // int typeParamIndex
        42: .line 138
      StackMap locals: java.lang.Object java.lang.Class java.lang.String java.lang.Class java.lang.Class
      StackMap stack:
            aload 4 /* currentClass */
            invokevirtual java.lang.Class.getSuperclass:()Ljava/lang/Class;
            astore 4 /* currentClass */
        43: .line 139
            aload 4 /* currentClass */
            ifnonnull 2
        44: .line 140
            aload 3 /* thisClass */
            aload 2 /* typeParamName */
            invokestatic io.netty.util.internal.TypeParameterMatcher.fail:(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Class;
            areturn
        end local 4 // java.lang.Class currentClass
        end local 3 // java.lang.Class thisClass
        end local 2 // java.lang.String typeParamName
        end local 1 // java.lang.Class parametrizedSuperclass
        end local 0 // java.lang.Object object
      LocalVariableTable:
        Start  End  Slot                    Name  Signature
            0   45     0                  object  Ljava/lang/Object;
            0   45     1  parametrizedSuperclass  Ljava/lang/Class<*>;
            0   45     2           typeParamName  Ljava/lang/String;
            1   45     3               thisClass  Ljava/lang/Class<*>;
            2   45     4            currentClass  Ljava/lang/Class<*>;
            4   42     5          typeParamIndex  I
            5   42     6              typeParams  [Ljava/lang/reflect/TypeVariable;
            6   12     7                       i  I
           17   42     7        genericSuperType  Ljava/lang/reflect/Type;
           20   42     8        actualTypeParams  [Ljava/lang/reflect/Type;
           21   42     9         actualTypeParam  Ljava/lang/reflect/Type;
           27   31    10           componentType  Ljava/lang/reflect/Type;
           33   41    10                       v  Ljava/lang/reflect/TypeVariable<*>;
    Signature: (Ljava/lang/Object;Ljava/lang/Class<*>;Ljava/lang/String;)Ljava/lang/Class<*>;
    MethodParameters:
                        Name  Flags
      object                  final
      parametrizedSuperclass  
      typeParamName           

  private static java.lang.Class<?> fail(java.lang.Class<?>, java.lang.String);
    descriptor: (Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Class;
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=5, locals=2, args_size=2
        start local 0 // java.lang.Class type
        start local 1 // java.lang.String typeParamName
         0: .line 146
            new java.lang.IllegalStateException
            dup
         1: .line 147
            new java.lang.StringBuilder
            dup
            ldc "cannot determine the type of the type parameter '"
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 1 /* typeParamName */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            ldc "': "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 0 /* type */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         2: .line 146
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
        end local 1 // java.lang.String typeParamName
        end local 0 // java.lang.Class type
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    3     0           type  Ljava/lang/Class<*>;
            0    3     1  typeParamName  Ljava/lang/String;
    Signature: (Ljava/lang/Class<*>;Ljava/lang/String;)Ljava/lang/Class<*>;
    MethodParameters:
               Name  Flags
      type           
      typeParamName  

  public abstract boolean match(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      msg   

  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // io.netty.util.internal.TypeParameterMatcher this
         0: .line 165
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // io.netty.util.internal.TypeParameterMatcher this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/netty/util/internal/TypeParameterMatcher;
}
SourceFile: "TypeParameterMatcher.java"
NestMembers:
  io.netty.util.internal.TypeParameterMatcher$1  io.netty.util.internal.TypeParameterMatcher$ReflectiveMatcher
InnerClasses:
  io.netty.util.internal.TypeParameterMatcher$1
  private final ReflectiveMatcher = io.netty.util.internal.TypeParameterMatcher$ReflectiveMatcher of io.netty.util.internal.TypeParameterMatcher