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 abstract class com.google.common.collect.MultimapBuilder$SetMultimapBuilder<K0, V0> extends com.google.common.collect.MultimapBuilder<K0, V0>
  minor version: 0
  major version: 59
  flags: flags: (0x0421) ACC_PUBLIC, ACC_SUPER, ACC_ABSTRACT
  this_class: com.google.common.collect.MultimapBuilder$SetMultimapBuilder
  super_class: com.google.common.collect.MultimapBuilder
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.MultimapBuilder$SetMultimapBuilder this
         0: .line 438
            aload 0 /* this */
            invokespecial com.google.common.collect.MultimapBuilder.<init>:()V
            return
        end local 0 // com.google.common.collect.MultimapBuilder$SetMultimapBuilder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/MultimapBuilder$SetMultimapBuilder<TK0;TV0;>;

  public abstract <K extends K0, V extends V0> com.google.common.collect.SetMultimap<K, V> build();
    descriptor: ()Lcom/google/common/collect/SetMultimap;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: <K:TK0;V:TV0;>()Lcom/google/common/collect/SetMultimap<TK;TV;>;

  public <K extends K0, V extends V0> com.google.common.collect.SetMultimap<K, V> build(com.google.common.collect.Multimap<? extends K, ? extends V>);
    descriptor: (Lcom/google/common/collect/Multimap;)Lcom/google/common/collect/SetMultimap;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.MultimapBuilder$SetMultimapBuilder this
        start local 1 // com.google.common.collect.Multimap multimap
         0: .line 446
            aload 0 /* this */
            aload 1 /* multimap */
            invokespecial com.google.common.collect.MultimapBuilder.build:(Lcom/google/common/collect/Multimap;)Lcom/google/common/collect/Multimap;
            checkcast com.google.common.collect.SetMultimap
            areturn
        end local 1 // com.google.common.collect.Multimap multimap
        end local 0 // com.google.common.collect.MultimapBuilder$SetMultimapBuilder this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Lcom/google/common/collect/MultimapBuilder$SetMultimapBuilder<TK0;TV0;>;
            0    1     1  multimap  Lcom/google/common/collect/Multimap<+TK;+TV;>;
    Signature: <K:TK0;V:TV0;>(Lcom/google/common/collect/Multimap<+TK;+TV;>;)Lcom/google/common/collect/SetMultimap<TK;TV;>;
    MethodParameters:
          Name  Flags
      multimap  

  public com.google.common.collect.Multimap build(com.google.common.collect.Multimap);
    descriptor: (Lcom/google/common/collect/Multimap;)Lcom/google/common/collect/Multimap;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast com.google.common.collect.Multimap
            invokevirtual com.google.common.collect.MultimapBuilder$SetMultimapBuilder.build:(Lcom/google/common/collect/Multimap;)Lcom/google/common/collect/SetMultimap;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public com.google.common.collect.Multimap build();
    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
            invokevirtual com.google.common.collect.MultimapBuilder$SetMultimapBuilder.build:()Lcom/google/common/collect/SetMultimap;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <K0:Ljava/lang/Object;V0:Ljava/lang/Object;>Lcom/google/common/collect/MultimapBuilder<TK0;TV0;>;
SourceFile: "MultimapBuilder.java"
NestHost: com.google.common.collect.MultimapBuilder
InnerClasses:
  public abstract SetMultimapBuilder = com.google.common.collect.MultimapBuilder$SetMultimapBuilder of com.google.common.collect.MultimapBuilder