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. 
final class com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry<K> extends com.google.common.collect.MapMakerInternalMap$AbstractWeakKeyEntry<K, com.google.common.collect.MapMaker$Dummy, com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry<K>> implements com.google.common.collect.MapMakerInternalMap$StrongValueEntry<K, com.google.common.collect.MapMaker$Dummy, com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry<K>>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry
  super_class: com.google.common.collect.MapMakerInternalMap$AbstractWeakKeyEntry
{
  void <init>(java.lang.ref.ReferenceQueue<K>, K, int, com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry<K>);
    descriptor: (Ljava/lang/ref/ReferenceQueue;Ljava/lang/Object;ILcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry;)V
    flags: (0x0000) 
    Code:
      stack=5, locals=5, args_size=5
        start local 0 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry this
        start local 1 // java.lang.ref.ReferenceQueue queue
        start local 2 // java.lang.Object key
        start local 3 // int hash
        start local 4 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry next
         0: .line 679
            aload 0 /* this */
            aload 1 /* queue */
            aload 2 /* key */
            iload 3 /* hash */
            aload 4 /* next */
            invokespecial com.google.common.collect.MapMakerInternalMap$AbstractWeakKeyEntry.<init>:(Ljava/lang/ref/ReferenceQueue;Ljava/lang/Object;ILcom/google/common/collect/MapMakerInternalMap$InternalEntry;)V
         1: .line 680
            return
        end local 4 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry next
        end local 3 // int hash
        end local 2 // java.lang.Object key
        end local 1 // java.lang.ref.ReferenceQueue queue
        end local 0 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;
            0    2     1  queue  Ljava/lang/ref/ReferenceQueue<TK;>;
            0    2     2    key  TK;
            0    2     3   hash  I
            0    2     4   next  Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;
    Signature: (Ljava/lang/ref/ReferenceQueue<TK;>;TK;ILcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;)V
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
       Name  Flags
      queue  
      key    
      hash   
      next   

  public com.google.common.collect.MapMaker$Dummy getValue();
    descriptor: ()Lcom/google/common/collect/MapMaker$Dummy;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry this
         0: .line 684
            getstatic com.google.common.collect.MapMaker$Dummy.VALUE:Lcom/google/common/collect/MapMaker$Dummy;
            areturn
        end local 0 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;

  void setValue(com.google.common.collect.MapMaker$Dummy);
    descriptor: (Lcom/google/common/collect/MapMaker$Dummy;)V
    flags: (0x0000) 
    Code:
      stack=0, locals=2, args_size=2
        start local 0 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry this
        start local 1 // com.google.common.collect.MapMaker$Dummy value
         0: .line 687
            return
        end local 1 // com.google.common.collect.MapMaker$Dummy value
        end local 0 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;
            0    1     1  value  Lcom/google/common/collect/MapMaker$Dummy;
    MethodParameters:
       Name  Flags
      value  

  com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry<K> copy(java.lang.ref.ReferenceQueue<K>, com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry<K>);
    descriptor: (Ljava/lang/ref/ReferenceQueue;Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry;)Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry;
    flags: (0x0000) 
    Code:
      stack=6, locals=3, args_size=3
        start local 0 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry this
        start local 1 // java.lang.ref.ReferenceQueue queueForKeys
        start local 2 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry newNext
         0: .line 691
            new com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry
            dup
            aload 1 /* queueForKeys */
            aload 0 /* this */
            invokevirtual com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry.getKey:()Ljava/lang/Object;
            aload 0 /* this */
            getfield com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry.hash:I
            aload 2 /* newNext */
            invokespecial com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry.<init>:(Ljava/lang/ref/ReferenceQueue;Ljava/lang/Object;ILcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry;)V
            areturn
        end local 2 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry newNext
        end local 1 // java.lang.ref.ReferenceQueue queueForKeys
        end local 0 // com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    1     0          this  Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;
            0    1     1  queueForKeys  Ljava/lang/ref/ReferenceQueue<TK;>;
            0    1     2       newNext  Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;
    Signature: (Ljava/lang/ref/ReferenceQueue<TK;>;Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;)Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;
    MethodParameters:
              Name  Flags
      queueForKeys  
      newNext       

  public java.lang.Object getValue();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry.getValue:()Lcom/google/common/collect/MapMaker$Dummy;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <K:Ljava/lang/Object;>Lcom/google/common/collect/MapMakerInternalMap$AbstractWeakKeyEntry<TK;Lcom/google/common/collect/MapMaker$Dummy;Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;>;Lcom/google/common/collect/MapMakerInternalMap$StrongValueEntry<TK;Lcom/google/common/collect/MapMaker$Dummy;Lcom/google/common/collect/MapMakerInternalMap$WeakKeyDummyValueEntry<TK;>;>;
SourceFile: "MapMakerInternalMap.java"
NestHost: com.google.common.collect.MapMakerInternalMap
InnerClasses:
  final Dummy = com.google.common.collect.MapMaker$Dummy of com.google.common.collect.MapMaker
  abstract AbstractWeakKeyEntry = com.google.common.collect.MapMakerInternalMap$AbstractWeakKeyEntry of com.google.common.collect.MapMakerInternalMap
  abstract InternalEntry = com.google.common.collect.MapMakerInternalMap$InternalEntry of com.google.common.collect.MapMakerInternalMap
  abstract StrongValueEntry = com.google.common.collect.MapMakerInternalMap$StrongValueEntry of com.google.common.collect.MapMakerInternalMap
  final WeakKeyDummyValueEntry = com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry of com.google.common.collect.MapMakerInternalMap
  final Helper = com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry$Helper of com.google.common.collect.MapMakerInternalMap$WeakKeyDummyValueEntry