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 
public final class org.eclipse.collections.impl.tuple.Tuples
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.eclipse.collections.impl.tuple.Tuples
  super_class: java.lang.Object
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.tuple.Tuples this
         0: .line 27
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 29
            return
        end local 0 // org.eclipse.collections.impl.tuple.Tuples this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/eclipse/collections/impl/tuple/Tuples;

  public static <K, V> org.eclipse.collections.api.tuple.Pair<K, V> pairFrom(java.util.Map$Entry<K, V>);
    descriptor: (Ljava/util/Map$Entry;)Lorg/eclipse/collections/api/tuple/Pair;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // java.util.Map$Entry entry
         0: .line 33
            aload 0 /* entry */
            invokeinterface java.util.Map$Entry.getKey:()Ljava/lang/Object;
            aload 0 /* entry */
            invokeinterface java.util.Map$Entry.getValue:()Ljava/lang/Object;
            invokestatic org.eclipse.collections.impl.tuple.Tuples.pair:(Ljava/lang/Object;Ljava/lang/Object;)Lorg/eclipse/collections/api/tuple/Pair;
            areturn
        end local 0 // java.util.Map$Entry entry
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0  entry  Ljava/util/Map$Entry<TK;TV;>;
    Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>(Ljava/util/Map$Entry<TK;TV;>;)Lorg/eclipse/collections/api/tuple/Pair<TK;TV;>;
    MethodParameters:
       Name  Flags
      entry  

  public static <T1, T2> org.eclipse.collections.api.tuple.Pair<T1, T2> pair(T1, T2);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Lorg/eclipse/collections/api/tuple/Pair;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // java.lang.Object one
        start local 1 // java.lang.Object two
         0: .line 38
            new org.eclipse.collections.impl.tuple.PairImpl
            dup
            aload 0 /* one */
            aload 1 /* two */
            invokespecial org.eclipse.collections.impl.tuple.PairImpl.<init>:(Ljava/lang/Object;Ljava/lang/Object;)V
            areturn
        end local 1 // java.lang.Object two
        end local 0 // java.lang.Object one
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0   one  TT1;
            0    1     1   two  TT2;
    Signature: <T1:Ljava/lang/Object;T2:Ljava/lang/Object;>(TT1;TT2;)Lorg/eclipse/collections/api/tuple/Pair<TT1;TT2;>;
    MethodParameters:
      Name  Flags
      one   
      two   

  public static <T> org.eclipse.collections.api.tuple.Twin<T> twin(T, T);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)Lorg/eclipse/collections/api/tuple/Twin;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // java.lang.Object one
        start local 1 // java.lang.Object two
         0: .line 43
            new org.eclipse.collections.impl.tuple.TwinImpl
            dup
            aload 0 /* one */
            aload 1 /* two */
            invokespecial org.eclipse.collections.impl.tuple.TwinImpl.<init>:(Ljava/lang/Object;Ljava/lang/Object;)V
            areturn
        end local 1 // java.lang.Object two
        end local 0 // java.lang.Object one
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0   one  TT;
            0    1     1   two  TT;
    Signature: <T:Ljava/lang/Object;>(TT;TT;)Lorg/eclipse/collections/api/tuple/Twin<TT;>;
    MethodParameters:
      Name  Flags
      one   
      two   
}
SourceFile: "Tuples.java"
InnerClasses:
  public abstract Entry = java.util.Map$Entry of java.util.Map