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.Streams$TemporaryPair<A, B>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.Streams$TemporaryPair
  super_class: java.lang.Object
{
  final A a;
    descriptor: Ljava/lang/Object;
    flags: (0x0010) ACC_FINAL
    Signature: TA;

  final B b;
    descriptor: Ljava/lang/Object;
    flags: (0x0010) ACC_FINAL
    Signature: TB;

  void <init>(A, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.google.common.collect.Streams$TemporaryPair this
        start local 1 // java.lang.Object a
        start local 2 // java.lang.Object b
         0: .line 320
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 321
            aload 0 /* this */
            aload 1 /* a */
            putfield com.google.common.collect.Streams$TemporaryPair.a:Ljava/lang/Object;
         2: .line 322
            aload 0 /* this */
            aload 2 /* b */
            putfield com.google.common.collect.Streams$TemporaryPair.b:Ljava/lang/Object;
         3: .line 323
            return
        end local 2 // java.lang.Object b
        end local 1 // java.lang.Object a
        end local 0 // com.google.common.collect.Streams$TemporaryPair this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lcom/google/common/collect/Streams$TemporaryPair<TA;TB;>;
            0    4     1     a  TA;
            0    4     2     b  TB;
    Signature: (TA;TB;)V
    MethodParameters:
      Name  Flags
      a     
      b     
}
Signature: <A:Ljava/lang/Object;B:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "Streams.java"
NestHost: com.google.common.collect.Streams
InnerClasses:
  private TemporaryPair = com.google.common.collect.Streams$TemporaryPair of com.google.common.collect.Streams