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. 
interface com.google.common.collect.MapMakerInternalMap$WeakValueReference<K, V, E extends com.google.common.collect.MapMakerInternalMap$InternalEntry<K, V, E>>
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.google.common.collect.MapMakerInternalMap$WeakValueReference
  super_class: java.lang.Object
{
  public abstract V get();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()TV;
    RuntimeVisibleTypeAnnotations: 
      METHOD_RETURN
        org.checkerframework.checker.nullness.qual.Nullable()

  public abstract E getEntry();
    descriptor: ()Lcom/google/common/collect/MapMakerInternalMap$InternalEntry;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()TE;

  public abstract void clear();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract com.google.common.collect.MapMakerInternalMap$WeakValueReference<K, V, E> copyFor(java.lang.ref.ReferenceQueue<V>, E);
    descriptor: (Ljava/lang/ref/ReferenceQueue;Lcom/google/common/collect/MapMakerInternalMap$InternalEntry;)Lcom/google/common/collect/MapMakerInternalMap$WeakValueReference;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljava/lang/ref/ReferenceQueue<TV;>;TE;)Lcom/google/common/collect/MapMakerInternalMap$WeakValueReference<TK;TV;TE;>;
    MethodParameters:
       Name  Flags
      queue  
      entry  
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;E::Lcom/google/common/collect/MapMakerInternalMap$InternalEntry<TK;TV;TE;>;>Ljava/lang/Object;
SourceFile: "MapMakerInternalMap.java"
NestHost: com.google.common.collect.MapMakerInternalMap
InnerClasses:
  abstract InternalEntry = com.google.common.collect.MapMakerInternalMap$InternalEntry of com.google.common.collect.MapMakerInternalMap
  abstract WeakValueReference = com.google.common.collect.MapMakerInternalMap$WeakValueReference of com.google.common.collect.MapMakerInternalMap