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.block.factory.Functions$IntFunctionChain<T1, T2> implements org.eclipse.collections.api.block.function.primitive.IntFunction<T1>
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private final org.eclipse.collections.api.block.function.Function<T1, T2> function1;
    descriptor: Lorg/eclipse/collections/api/block/function/Function;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Lorg/eclipse/collections/api/block/function/Function<TT1;TT2;>;

  private final org.eclipse.collections.api.block.function.primitive.IntFunction<? super T2> function2;
    descriptor: Lorg/eclipse/collections/api/block/function/primitive/IntFunction;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Lorg/eclipse/collections/api/block/function/primitive/IntFunction<-TT2;>;

  private void <init>(org.eclipse.collections.api.block.function.Function<T1, T2>, org.eclipse.collections.api.block.function.primitive.IntFunction<? super T2>);
    descriptor: (Lorg/eclipse/collections/api/block/function/Function;Lorg/eclipse/collections/api/block/function/primitive/IntFunction;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain this
        start local 1 // org.eclipse.collections.api.block.function.Function function1
        start local 2 // org.eclipse.collections.api.block.function.primitive.IntFunction function2
         0: .line 1009
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 1011
            aload 0 /* this */
            aload 1 /* function1 */
            putfield org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain.function1:Lorg/eclipse/collections/api/block/function/Function;
         2: .line 1012
            aload 0 /* this */
            aload 2 /* function2 */
            putfield org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain.function2:Lorg/eclipse/collections/api/block/function/primitive/IntFunction;
         3: .line 1013
            return
        end local 2 // org.eclipse.collections.api.block.function.primitive.IntFunction function2
        end local 1 // org.eclipse.collections.api.block.function.Function function1
        end local 0 // org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    4     0       this  Lorg/eclipse/collections/impl/block/factory/Functions$IntFunctionChain<TT1;TT2;>;
            0    4     1  function1  Lorg/eclipse/collections/api/block/function/Function<TT1;TT2;>;
            0    4     2  function2  Lorg/eclipse/collections/api/block/function/primitive/IntFunction<-TT2;>;
    Signature: (Lorg/eclipse/collections/api/block/function/Function<TT1;TT2;>;Lorg/eclipse/collections/api/block/function/primitive/IntFunction<-TT2;>;)V
    MethodParameters:
           Name  Flags
      function1  
      function2  

  public int intValueOf();
    descriptor: (Ljava/lang/Object;)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain this
        start local 1 // java.lang.Object object
         0: .line 1018
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain.function2:Lorg/eclipse/collections/api/block/function/primitive/IntFunction;
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain.function1:Lorg/eclipse/collections/api/block/function/Function;
            aload 1 /* object */
            invokeinterface org.eclipse.collections.api.block.function.Function.valueOf:(Ljava/lang/Object;)Ljava/lang/Object;
            invokeinterface org.eclipse.collections.api.block.function.primitive.IntFunction.intValueOf:(Ljava/lang/Object;)I
            ireturn
        end local 1 // java.lang.Object object
        end local 0 // org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain this
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0    this  Lorg/eclipse/collections/impl/block/factory/Functions$IntFunctionChain<TT1;TT2;>;
            0    1     1  object  TT1;
    Signature: (TT1;)I
    MethodParameters:
        Name  Flags
      object  
}
Signature: <T1:Ljava/lang/Object;T2:Ljava/lang/Object;>Ljava/lang/Object;Lorg/eclipse/collections/api/block/function/primitive/IntFunction<TT1;>;
SourceFile: "Functions.java"
NestHost: org.eclipse.collections.impl.block.factory.Functions
InnerClasses:
  public final IntFunctionChain = org.eclipse.collections.impl.block.factory.Functions$IntFunctionChain of org.eclipse.collections.impl.block.factory.Functions