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.ImmutableMultimap$EntryCollection<K, V> extends com.google.common.collect.ImmutableCollection<java.util.Map$Entry<K, V>>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.ImmutableMultimap$EntryCollection
  super_class: com.google.common.collect.ImmutableCollection
{
  final com.google.common.collect.ImmutableMultimap<K, V> multimap;
    descriptor: Lcom/google/common/collect/ImmutableMultimap;
    flags: (0x0010) ACC_FINAL
    Signature: Lcom/google/common/collect/ImmutableMultimap<TK;TV;>;
    RuntimeInvisibleAnnotations: 
      com.google.j2objc.annotations.Weak()

  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 0

  void <init>(com.google.common.collect.ImmutableMultimap<K, V>);
    descriptor: (Lcom/google/common/collect/ImmutableMultimap;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
        start local 1 // com.google.common.collect.ImmutableMultimap multimap
         0: .line 530
            aload 0 /* this */
            invokespecial com.google.common.collect.ImmutableCollection.<init>:()V
         1: .line 531
            aload 0 /* this */
            aload 1 /* multimap */
            putfield com.google.common.collect.ImmutableMultimap$EntryCollection.multimap:Lcom/google/common/collect/ImmutableMultimap;
         2: .line 532
            return
        end local 1 // com.google.common.collect.ImmutableMultimap multimap
        end local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lcom/google/common/collect/ImmutableMultimap$EntryCollection<TK;TV;>;
            0    3     1  multimap  Lcom/google/common/collect/ImmutableMultimap<TK;TV;>;
    Signature: (Lcom/google/common/collect/ImmutableMultimap<TK;TV;>;)V
    MethodParameters:
          Name  Flags
      multimap  

  public com.google.common.collect.UnmodifiableIterator<java.util.Map$Entry<K, V>> iterator();
    descriptor: ()Lcom/google/common/collect/UnmodifiableIterator;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
         0: .line 536
            aload 0 /* this */
            getfield com.google.common.collect.ImmutableMultimap$EntryCollection.multimap:Lcom/google/common/collect/ImmutableMultimap;
            invokevirtual com.google.common.collect.ImmutableMultimap.entryIterator:()Lcom/google/common/collect/UnmodifiableIterator;
            areturn
        end local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/ImmutableMultimap$EntryCollection<TK;TV;>;
    Signature: ()Lcom/google/common/collect/UnmodifiableIterator<Ljava/util/Map$Entry<TK;TV;>;>;

  boolean isPartialView();
    descriptor: ()Z
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
         0: .line 541
            aload 0 /* this */
            getfield com.google.common.collect.ImmutableMultimap$EntryCollection.multimap:Lcom/google/common/collect/ImmutableMultimap;
            invokevirtual com.google.common.collect.ImmutableMultimap.isPartialView:()Z
            ireturn
        end local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/ImmutableMultimap$EntryCollection<TK;TV;>;

  public int size();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
         0: .line 546
            aload 0 /* this */
            getfield com.google.common.collect.ImmutableMultimap$EntryCollection.multimap:Lcom/google/common/collect/ImmutableMultimap;
            invokevirtual com.google.common.collect.ImmutableMultimap.size:()I
            ireturn
        end local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/ImmutableMultimap$EntryCollection<TK;TV;>;

  public boolean contains(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
        start local 1 // java.lang.Object object
         0: .line 551
            aload 1 /* object */
            instanceof java.util.Map$Entry
            ifeq 3
         1: .line 552
            aload 1 /* object */
            checkcast java.util.Map$Entry
            astore 2 /* entry */
        start local 2 // java.util.Map$Entry entry
         2: .line 553
            aload 0 /* this */
            getfield com.google.common.collect.ImmutableMultimap$EntryCollection.multimap:Lcom/google/common/collect/ImmutableMultimap;
            aload 2 /* entry */
            invokeinterface java.util.Map$Entry.getKey:()Ljava/lang/Object;
            aload 2 /* entry */
            invokeinterface java.util.Map$Entry.getValue:()Ljava/lang/Object;
            invokevirtual com.google.common.collect.ImmutableMultimap.containsEntry:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ireturn
        end local 2 // java.util.Map$Entry entry
         3: .line 555
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
        end local 1 // java.lang.Object object
        end local 0 // com.google.common.collect.ImmutableMultimap$EntryCollection this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    4     0    this  Lcom/google/common/collect/ImmutableMultimap$EntryCollection<TK;TV;>;
            0    4     1  object  Ljava/lang/Object;
            2    3     2   entry  Ljava/util/Map$Entry<**>;
    MethodParameters:
        Name  Flags
      object  

  public java.util.Iterator iterator();
    descriptor: ()Ljava/util/Iterator;
    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.ImmutableMultimap$EntryCollection.iterator:()Lcom/google/common/collect/UnmodifiableIterator;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>Lcom/google/common/collect/ImmutableCollection<Ljava/util/Map$Entry<TK;TV;>;>;
SourceFile: "ImmutableMultimap.java"
NestHost: com.google.common.collect.ImmutableMultimap
InnerClasses:
  private EntryCollection = com.google.common.collect.ImmutableMultimap$EntryCollection of com.google.common.collect.ImmutableMultimap
  public abstract Entry = java.util.Map$Entry of java.util.Map