https://github.com/google/guava/guava: Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more. 
class com.google.common.collect.Maps$TransformedEntriesMap<K, V1, V2> extends com.google.common.collect.Maps$IteratorBasedAbstractMap<K, V2>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.Maps$TransformedEntriesMap
  super_class: com.google.common.collect.Maps$IteratorBasedAbstractMap
{
  final java.util.Map<K, V1> fromMap;
    descriptor: Ljava/util/Map;
    flags: (0x0010) ACC_FINAL
    Signature: Ljava/util/Map<TK;TV1;>;

  final com.google.common.collect.Maps$EntryTransformer<? super K, ? super V1, V2> transformer;
    descriptor: Lcom/google/common/collect/Maps$EntryTransformer;
    flags: (0x0010) ACC_FINAL
    Signature: Lcom/google/common/collect/Maps$EntryTransformer<-TK;-TV1;TV2;>;

  void <init>(java.util.Map<K, V1>, com.google.common.collect.Maps$EntryTransformer<? super K, ? super V1, V2>);
    descriptor: (Ljava/util/Map;Lcom/google/common/collect/Maps$EntryTransformer;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
        start local 1 // java.util.Map fromMap
        start local 2 // com.google.common.collect.Maps$EntryTransformer transformer
         0: .line 2012
            aload 0 /* this */
            invokespecial com.google.common.collect.Maps$IteratorBasedAbstractMap.<init>:()V
         1: .line 2014
            aload 0 /* this */
            aload 1 /* fromMap */
            invokestatic com.google.common.base.Preconditions.checkNotNull:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast java.util.Map
            putfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
         2: .line 2015
            aload 0 /* this */
            aload 2 /* transformer */
            invokestatic com.google.common.base.Preconditions.checkNotNull:(Ljava/lang/Object;)Ljava/lang/Object;
            checkcast com.google.common.collect.Maps$EntryTransformer
            putfield com.google.common.collect.Maps$TransformedEntriesMap.transformer:Lcom/google/common/collect/Maps$EntryTransformer;
         3: .line 2016
            return
        end local 2 // com.google.common.collect.Maps$EntryTransformer transformer
        end local 1 // java.util.Map fromMap
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    4     0         this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
            0    4     1      fromMap  Ljava/util/Map<TK;TV1;>;
            0    4     2  transformer  Lcom/google/common/collect/Maps$EntryTransformer<-TK;-TV1;TV2;>;
    Signature: (Ljava/util/Map<TK;TV1;>;Lcom/google/common/collect/Maps$EntryTransformer<-TK;-TV1;TV2;>;)V
    MethodParameters:
             Name  Flags
      fromMap      
      transformer  

  public int size();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
         0: .line 2020
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            invokeinterface java.util.Map.size:()I
            ireturn
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;

  public boolean containsKey(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
        start local 1 // java.lang.Object key
         0: .line 2025
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            aload 1 /* key */
            invokeinterface java.util.Map.containsKey:(Ljava/lang/Object;)Z
            ireturn
        end local 1 // java.lang.Object key
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
            0    1     1   key  Ljava/lang/Object;
    MethodParameters:
      Name  Flags
      key   

  public V2 get();
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
        start local 1 // java.lang.Object key
         0: .line 2030
            aload 0 /* this */
            aload 1 /* key */
            aconst_null
            invokevirtual com.google.common.collect.Maps$TransformedEntriesMap.getOrDefault:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            areturn
        end local 1 // java.lang.Object key
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
            0    1     1   key  Ljava/lang/Object;
    Signature: (Ljava/lang/Object;)TV2;
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
      METHOD_RETURN
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
      Name  Flags
      key   

  public V2 getOrDefault(, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=4, args_size=3
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
        start local 1 // java.lang.Object key
        start local 2 // java.lang.Object defaultValue
         0: .line 2037
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            aload 1 /* key */
            invokeinterface java.util.Map.get:(Ljava/lang/Object;)Ljava/lang/Object;
            astore 3 /* value */
        start local 3 // java.lang.Object value
         1: .line 2038
            aload 3 /* value */
            ifnonnull 2
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            aload 1 /* key */
            invokeinterface java.util.Map.containsKey:(Ljava/lang/Object;)Z
            ifeq 3
         2: .line 2039
      StackMap locals: java.lang.Object
      StackMap stack:
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.transformer:Lcom/google/common/collect/Maps$EntryTransformer;
            aload 1 /* key */
            aload 3 /* value */
            invokeinterface com.google.common.collect.Maps$EntryTransformer.transformEntry:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            goto 4
         3: .line 2040
      StackMap locals:
      StackMap stack:
            aload 2 /* defaultValue */
         4: .line 2038
      StackMap locals:
      StackMap stack: java.lang.Object
            areturn
        end local 3 // java.lang.Object value
        end local 2 // java.lang.Object defaultValue
        end local 1 // java.lang.Object key
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    5     0          this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
            0    5     1           key  Ljava/lang/Object;
            0    5     2  defaultValue  TV2;
            1    5     3         value  TV1;
    Signature: (Ljava/lang/Object;TV2;)TV2;
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
      METHOD_RETURN
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
              Name  Flags
      key           
      defaultValue  

  public V2 remove();
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
        start local 1 // java.lang.Object key
         0: .line 2047
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            aload 1 /* key */
            invokeinterface java.util.Map.containsKey:(Ljava/lang/Object;)Z
            ifeq 2
         1: .line 2048
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.transformer:Lcom/google/common/collect/Maps$EntryTransformer;
            aload 1 /* key */
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            aload 1 /* key */
            invokeinterface java.util.Map.remove:(Ljava/lang/Object;)Ljava/lang/Object;
            invokeinterface com.google.common.collect.Maps$EntryTransformer.transformEntry:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            goto 3
         2: .line 2049
      StackMap locals:
      StackMap stack:
            aconst_null
         3: .line 2047
      StackMap locals:
      StackMap stack: java.lang.Object
            areturn
        end local 1 // java.lang.Object key
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
            0    4     1   key  Ljava/lang/Object;
    Signature: (Ljava/lang/Object;)TV2;
    MethodParameters:
      Name  Flags
      key   

  public void clear();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
         0: .line 2054
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            invokeinterface java.util.Map.clear:()V
         1: .line 2055
            return
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;

  public java.util.Set<K> keySet();
    descriptor: ()Ljava/util/Set;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
         0: .line 2059
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            invokeinterface java.util.Map.keySet:()Ljava/util/Set;
            areturn
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
    Signature: ()Ljava/util/Set<TK;>;

  java.util.Iterator<java.util.Map$Entry<K, V2>> entryIterator();
    descriptor: ()Ljava/util/Iterator;
    flags: (0x0000) 
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
         0: .line 2065
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            invokeinterface java.util.Map.entrySet:()Ljava/util/Set;
            invokeinterface java.util.Set.iterator:()Ljava/util/Iterator;
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.transformer:Lcom/google/common/collect/Maps$EntryTransformer;
            invokestatic com.google.common.collect.Maps.asEntryToEntryFunction:(Lcom/google/common/collect/Maps$EntryTransformer;)Lcom/google/common/base/Function;
         1: .line 2064
            invokestatic com.google.common.collect.Iterators.transform:(Ljava/util/Iterator;Lcom/google/common/base/Function;)Ljava/util/Iterator;
            areturn
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
    Signature: ()Ljava/util/Iterator<Ljava/util/Map$Entry<TK;TV2;>;>;

  java.util.Spliterator<java.util.Map$Entry<K, V2>> entrySpliterator();
    descriptor: ()Ljava/util/Spliterator;
    flags: (0x0000) 
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
         0: .line 2071
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            invokeinterface java.util.Map.entrySet:()Ljava/util/Set;
            invokeinterface java.util.Set.spliterator:()Ljava/util/Spliterator;
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.transformer:Lcom/google/common/collect/Maps$EntryTransformer;
            invokestatic com.google.common.collect.Maps.asEntryToEntryFunction:(Lcom/google/common/collect/Maps$EntryTransformer;)Lcom/google/common/base/Function;
         1: .line 2070
            invokestatic com.google.common.collect.CollectSpliterators.map:(Ljava/util/Spliterator;Ljava/util/function/Function;)Ljava/util/Spliterator;
            areturn
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
    Signature: ()Ljava/util/Spliterator<Ljava/util/Map$Entry<TK;TV2;>;>;

  public void forEach(java.util.function.BiConsumer<? super K, ? super V2>);
    descriptor: (Ljava/util/function/BiConsumer;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
        start local 1 // java.util.function.BiConsumer action
         0: .line 2076
            aload 1 /* action */
            invokestatic com.google.common.base.Preconditions.checkNotNull:(Ljava/lang/Object;)Ljava/lang/Object;
            pop
         1: .line 2078
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.fromMap:Ljava/util/Map;
            aload 0 /* this */
            aload 1 /* action */
            invokedynamic accept(Lcom/google/common/collect/Maps$TransformedEntriesMap;Ljava/util/function/BiConsumer;)Ljava/util/function/BiConsumer;
              Bootstrap: invokestatic java.lang.invoke.LambdaMetafactory.metafactory:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
                Method arguments:
                  (Ljava/lang/Object;Ljava/lang/Object;)V
                  com/google/common/collect/Maps$TransformedEntriesMap.lambda$0(Ljava/util/function/BiConsumer;Ljava/lang/Object;Ljava/lang/Object;)V (7)
                  (Ljava/lang/Object;Ljava/lang/Object;)V
            invokeinterface java.util.Map.forEach:(Ljava/util/function/BiConsumer;)V
         2: .line 2079
            return
        end local 1 // java.util.function.BiConsumer action
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    3     0    this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
            0    3     1  action  Ljava/util/function/BiConsumer<-TK;-TV2;>;
    Signature: (Ljava/util/function/BiConsumer<-TK;-TV2;>;)V
    MethodParameters:
        Name  Flags
      action  

  public java.util.Collection<V2> values();
    descriptor: ()Ljava/util/Collection;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
         0: .line 2083
            new com.google.common.collect.Maps$Values
            dup
            aload 0 /* this */
            invokespecial com.google.common.collect.Maps$Values.<init>:(Ljava/util/Map;)V
            areturn
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
    Signature: ()Ljava/util/Collection<TV2;>;

  private void lambda$0(java.util.function.BiConsumer, java.lang.Object, java.lang.Object);
    descriptor: (Ljava/util/function/BiConsumer;Ljava/lang/Object;Ljava/lang/Object;)V
    flags: (0x1002) ACC_PRIVATE, ACC_SYNTHETIC
    Code:
      stack=5, locals=4, args_size=4
        start local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
        start local 2 // java.lang.Object k
        start local 3 // java.lang.Object v1
         0: .line 2078
            aload 1
            aload 2 /* k */
            aload 0 /* this */
            getfield com.google.common.collect.Maps$TransformedEntriesMap.transformer:Lcom/google/common/collect/Maps$EntryTransformer;
            aload 2 /* k */
            aload 3 /* v1 */
            invokeinterface com.google.common.collect.Maps$EntryTransformer.transformEntry:(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;
            invokeinterface java.util.function.BiConsumer.accept:(Ljava/lang/Object;Ljava/lang/Object;)V
            return
        end local 3 // java.lang.Object v1
        end local 2 // java.lang.Object k
        end local 0 // com.google.common.collect.Maps$TransformedEntriesMap this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/Maps$TransformedEntriesMap<TK;TV1;TV2;>;
            0    1     2     k  TK;
            0    1     3    v1  TV1;
}
Signature: <K:Ljava/lang/Object;V1:Ljava/lang/Object;V2:Ljava/lang/Object;>Lcom/google/common/collect/Maps$IteratorBasedAbstractMap<TK;TV2;>;
SourceFile: "Maps.java"
NestHost: com.google.common.collect.Maps
InnerClasses:
  public abstract EntryTransformer = com.google.common.collect.Maps$EntryTransformer of com.google.common.collect.Maps
  abstract IteratorBasedAbstractMap = com.google.common.collect.Maps$IteratorBasedAbstractMap of com.google.common.collect.Maps
  TransformedEntriesMap = com.google.common.collect.Maps$TransformedEntriesMap of com.google.common.collect.Maps
  Values = com.google.common.collect.Maps$Values of com.google.common.collect.Maps
  public final Lookup = java.lang.invoke.MethodHandles$Lookup of java.lang.invoke.MethodHandles
  public abstract Entry = java.util.Map$Entry of java.util.Map