https://github.com/eclipse/eclipse-collections/eclipse-collections-api: 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 
public interface org.eclipse.collections.api.tuple.primitive.DoubleDoublePair extends java.io.Serializable, java.lang.Comparable<org.eclipse.collections.api.tuple.primitive.DoubleDoublePair>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.eclipse.collections.api.tuple.primitive.DoubleDoublePair
  super_class: java.lang.Object
{
  public abstract double getOne();
    descriptor: ()D
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract double getTwo();
    descriptor: ()D
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
Signature: Ljava/lang/Object;Ljava/io/Serializable;Ljava/lang/Comparable<Lorg/eclipse/collections/api/tuple/primitive/DoubleDoublePair;>;
SourceFile: "DoubleDoublePair.java"