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 
public interface org.eclipse.collections.api.block.function.primitive.IntIntToIntFunction extends java.util.function.IntBinaryOperator, java.io.Serializable
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: org.eclipse.collections.api.block.function.primitive.IntIntToIntFunction
  super_class: java.lang.Object
{
  public abstract int valueOf(int, int);
    descriptor: (II)I
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      left   
      right  

  public int applyAsInt(int, int);
    descriptor: (II)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.eclipse.collections.api.block.function.primitive.IntIntToIntFunction this
        start local 1 // int left
        start local 2 // int right
         0: .line 29
            aload 0 /* this */
            iload 1 /* left */
            iload 2 /* right */
            invokeinterface org.eclipse.collections.api.block.function.primitive.IntIntToIntFunction.valueOf:(II)I
            ireturn
        end local 2 // int right
        end local 1 // int left
        end local 0 // org.eclipse.collections.api.block.function.primitive.IntIntToIntFunction this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lorg/eclipse/collections/api/block/function/primitive/IntIntToIntFunction;
            0    1     1   left  I
            0    1     2  right  I
    MethodParameters:
       Name  Flags
      left   
      right  
}
SourceFile: "IntIntToIntFunction.java"
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()