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. 
public interface com.google.common.collect.SetMultimap<K, V> extends com.google.common.collect.Multimap<K, V>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.google.common.collect.SetMultimap
  super_class: java.lang.Object
{
  public abstract java.util.Set<V> get(K);
    descriptor: (Ljava/lang/Object;)Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TK;)Ljava/util/Set<TV;>;
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
      Name  Flags
      key   

  public abstract java.util.Set<V> removeAll();
    descriptor: (Ljava/lang/Object;)Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Ljava/lang/Object;)Ljava/util/Set<TV;>;
    RuntimeInvisibleAnnotations: 
      com.google.errorprone.annotations.CanIgnoreReturnValue()
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
      Name  Flags
      key   

  public abstract java.util.Set<V> replaceValues(K, java.lang.Iterable<? extends V>);
    descriptor: (Ljava/lang/Object;Ljava/lang/Iterable;)Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TK;Ljava/lang/Iterable<+TV;>;)Ljava/util/Set<TV;>;
    RuntimeInvisibleAnnotations: 
      com.google.errorprone.annotations.CanIgnoreReturnValue()
    MethodParameters:
        Name  Flags
      key     
      values  

  public abstract java.util.Set<java.util.Map$Entry<K, V>> entries();
    descriptor: ()Ljava/util/Set;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/Set<Ljava/util/Map$Entry<TK;TV;>;>;

  public abstract java.util.Map<K, java.util.Collection<V>> asMap();
    descriptor: ()Ljava/util/Map;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/util/Map<TK;Ljava/util/Collection<TV;>;>;

  public abstract boolean equals(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    RuntimeVisibleTypeAnnotations: 
      METHOD_FORMAL_PARAMETER
        org.checkerframework.checker.nullness.qual.Nullable()
    MethodParameters:
      Name  Flags
      obj   

  public java.util.Collection entries();
    descriptor: ()Ljava/util/Collection;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokeinterface com.google.common.collect.SetMultimap.entries:()Ljava/util/Set;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.util.Collection removeAll(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/util/Collection;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            invokeinterface com.google.common.collect.SetMultimap.removeAll:(Ljava/lang/Object;)Ljava/util/Set;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.util.Collection get(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/util/Collection;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            invokeinterface com.google.common.collect.SetMultimap.get:(Ljava/lang/Object;)Ljava/util/Set;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.util.Collection replaceValues(java.lang.Object, java.lang.Iterable);
    descriptor: (Ljava/lang/Object;Ljava/lang/Iterable;)Ljava/util/Collection;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            aload 2
            checkcast java.lang.Iterable
            invokeinterface com.google.common.collect.SetMultimap.replaceValues:(Ljava/lang/Object;Ljava/lang/Iterable;)Ljava/util/Set;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>Ljava/lang/Object;Lcom/google/common/collect/Multimap<TK;TV;>;
SourceFile: "SetMultimap.java"
InnerClasses:
  public abstract Entry = java.util.Map$Entry of java.util.Map
    RuntimeInvisibleAnnotations: 
      com.google.common.annotations.GwtCompatible()