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.AbstractMultimap$EntrySet extends com.google.common.collect.AbstractMultimap<K, V>.Entries implements java.util.Set<java.util.Map$Entry<K, V>>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.AbstractMultimap$EntrySet
  super_class: com.google.common.collect.AbstractMultimap$Entries
{
  final com.google.common.collect.AbstractMultimap this$0;
    descriptor: Lcom/google/common/collect/AbstractMultimap;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.google.common.collect.AbstractMultimap);
    descriptor: (Lcom/google/common/collect/AbstractMultimap;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.AbstractMultimap$EntrySet this
         0: .line 140
            aload 0 /* this */
            aload 1
            putfield com.google.common.collect.AbstractMultimap$EntrySet.this$0:Lcom/google/common/collect/AbstractMultimap;
            aload 0 /* this */
            aload 1
            invokespecial com.google.common.collect.AbstractMultimap$Entries.<init>:(Lcom/google/common/collect/AbstractMultimap;)V
            return
        end local 0 // com.google.common.collect.AbstractMultimap$EntrySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/AbstractMultimap$EntrySet;
    MethodParameters:
        Name  Flags
      this$0  final

  public int hashCode();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.AbstractMultimap$EntrySet this
         0: .line 143
            aload 0 /* this */
            invokestatic com.google.common.collect.Sets.hashCodeImpl:(Ljava/util/Set;)I
            ireturn
        end local 0 // com.google.common.collect.AbstractMultimap$EntrySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/AbstractMultimap$EntrySet;

  public boolean equals(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.AbstractMultimap$EntrySet this
        start local 1 // java.lang.Object obj
         0: .line 148
            aload 0 /* this */
            aload 1 /* obj */
            invokestatic com.google.common.collect.Sets.equalsImpl:(Ljava/util/Set;Ljava/lang/Object;)Z
            ireturn
        end local 1 // java.lang.Object obj
        end local 0 // com.google.common.collect.AbstractMultimap$EntrySet this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/AbstractMultimap$EntrySet;
            0    1     1   obj  Ljava/lang/Object;
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
      Name  Flags
      obj   
}
Signature: Lcom/google/common/collect/AbstractMultimap<TK;TV;>.Entries;Ljava/util/Set<Ljava/util/Map$Entry<TK;TV;>;>;
SourceFile: "AbstractMultimap.java"
NestHost: com.google.common.collect.AbstractMultimap
InnerClasses:
  Entries = com.google.common.collect.AbstractMultimap$Entries of com.google.common.collect.AbstractMultimap
  EntrySet = com.google.common.collect.AbstractMultimap$EntrySet of com.google.common.collect.AbstractMultimap
  public abstract Entry = java.util.Map$Entry of java.util.Map