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 
class org.eclipse.collections.impl.block.factory.primitive.IntToIntFunctions$DecrementIntToIntFunction implements org.eclipse.collections.api.block.function.primitive.IntToIntFunction
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.eclipse.collections.impl.block.factory.primitive.IntToIntFunctions$DecrementIntToIntFunction
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.block.factory.primitive.IntToIntFunctions$DecrementIntToIntFunction this
         0: .line 57
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.eclipse.collections.impl.block.factory.primitive.IntToIntFunctions$DecrementIntToIntFunction this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/block/factory/primitive/IntToIntFunctions$DecrementIntToIntFunction;

  public int valueOf(int);
    descriptor: (I)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.block.factory.primitive.IntToIntFunctions$DecrementIntToIntFunction this
        start local 1 // int intParameter
         0: .line 64
            iload 1 /* intParameter */
            iconst_1
            isub
            ireturn
        end local 1 // int intParameter
        end local 0 // org.eclipse.collections.impl.block.factory.primitive.IntToIntFunctions$DecrementIntToIntFunction this
      LocalVariableTable:
        Start  End  Slot          Name  Signature
            0    1     0          this  Lorg/eclipse/collections/impl/block/factory/primitive/IntToIntFunctions$DecrementIntToIntFunction;
            0    1     1  intParameter  I
    MethodParameters:
              Name  Flags
      intParameter  
}
SourceFile: "IntToIntFunctions.java"
NestHost: org.eclipse.collections.impl.block.factory.primitive.IntToIntFunctions
InnerClasses:
  private DecrementIntToIntFunction = org.eclipse.collections.impl.block.factory.primitive.IntToIntFunctions$DecrementIntToIntFunction of org.eclipse.collections.impl.block.factory.primitive.IntToIntFunctions