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.FilteredSetMultimap<K, V> extends com.google.common.collect.FilteredMultimap<K, V>, com.google.common.collect.SetMultimap<K, V>
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.google.common.collect.FilteredSetMultimap
  super_class: java.lang.Object
{
  public abstract com.google.common.collect.SetMultimap<K, V> unfiltered();
    descriptor: ()Lcom/google/common/collect/SetMultimap;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Lcom/google/common/collect/SetMultimap<TK;TV;>;

  public com.google.common.collect.Multimap unfiltered();
    descriptor: ()Lcom/google/common/collect/Multimap;
    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.FilteredSetMultimap.unfiltered:()Lcom/google/common/collect/SetMultimap;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>Ljava/lang/Object;Lcom/google/common/collect/FilteredMultimap<TK;TV;>;Lcom/google/common/collect/SetMultimap<TK;TV;>;
SourceFile: "FilteredSetMultimap.java"
    RuntimeInvisibleAnnotations: 
      com.google.common.annotations.GwtCompatible()