https://github.com/eclipse/eclipse-collections/eclipse-collections: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar
  • Sirisha Pratha 
final class org.eclipse.collections.impl.tuple.TwinImpl<T> extends org.eclipse.collections.impl.tuple.PairImpl<T, T> implements org.eclipse.collections.api.tuple.Twin<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: org.eclipse.collections.impl.tuple.TwinImpl
  super_class: org.eclipse.collections.impl.tuple.PairImpl
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  void <init>(T, );
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.eclipse.collections.impl.tuple.TwinImpl this
        start local 1 // java.lang.Object newOne
        start local 2 // java.lang.Object newTwo
         0: .line 25
            aload 0 /* this */
            aload 1 /* newOne */
            aload 2 /* newTwo */
            invokespecial org.eclipse.collections.impl.tuple.PairImpl.<init>:(Ljava/lang/Object;Ljava/lang/Object;)V
         1: .line 26
            return
        end local 2 // java.lang.Object newTwo
        end local 1 // java.lang.Object newOne
        end local 0 // org.eclipse.collections.impl.tuple.TwinImpl this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    2     0    this  Lorg/eclipse/collections/impl/tuple/TwinImpl<TT;>;
            0    2     1  newOne  TT;
            0    2     2  newTwo  TT;
    Signature: (TT;TT;)V
    MethodParameters:
        Name  Flags
      newOne  
      newTwo  

  public org.eclipse.collections.impl.tuple.TwinImpl<T> swap();
    descriptor: ()Lorg/eclipse/collections/impl/tuple/TwinImpl;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.tuple.TwinImpl this
         0: .line 31
            new org.eclipse.collections.impl.tuple.TwinImpl
            dup
            aload 0 /* this */
            invokevirtual org.eclipse.collections.impl.tuple.TwinImpl.getTwo:()Ljava/lang/Object;
            aload 0 /* this */
            invokevirtual org.eclipse.collections.impl.tuple.TwinImpl.getOne:()Ljava/lang/Object;
            invokespecial org.eclipse.collections.impl.tuple.TwinImpl.<init>:(Ljava/lang/Object;Ljava/lang/Object;)V
            areturn
        end local 0 // org.eclipse.collections.impl.tuple.TwinImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/tuple/TwinImpl<TT;>;
    Signature: ()Lorg/eclipse/collections/impl/tuple/TwinImpl<TT;>;

  public org.eclipse.collections.api.tuple.Twin swap();
    descriptor: ()Lorg/eclipse/collections/api/tuple/Twin;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual org.eclipse.collections.impl.tuple.TwinImpl.swap:()Lorg/eclipse/collections/impl/tuple/TwinImpl;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public org.eclipse.collections.impl.tuple.PairImpl swap();
    descriptor: ()Lorg/eclipse/collections/impl/tuple/PairImpl;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual org.eclipse.collections.impl.tuple.TwinImpl.swap:()Lorg/eclipse/collections/impl/tuple/TwinImpl;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public org.eclipse.collections.api.tuple.Pair swap();
    descriptor: ()Lorg/eclipse/collections/api/tuple/Pair;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual org.eclipse.collections.impl.tuple.TwinImpl.swap:()Lorg/eclipse/collections/impl/tuple/TwinImpl;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <T:Ljava/lang/Object;>Lorg/eclipse/collections/impl/tuple/PairImpl<TT;TT;>;Lorg/eclipse/collections/api/tuple/Twin<TT;>;
SourceFile: "TwinImpl.java"