Delegator

        # Delegator < BasicObject

(from ruby core)
---
This library provides three different ways to delegate method calls to
an object.  The easiest to use is SimpleDelegator.  Pass an object to
the constructor and all methods supported by the object will be
delegated.  This object can be changed later.

Going a step further, the top level DelegateClass method allows you to
easily setup delegation through class inheritance.  This is considerably
more flexible and thus probably the most common use for this library.

Finally, if you need full control over the delegation scheme, you can
inherit from the abstract class Delegator and customize as needed.  (If
you find yourself needing this control, have a look at Forwardable which
is also in the standard library.  It may suit your needs better.)

SimpleDelegator's implementation serves as a nice example of the use of
Delegator:

    require 'delegate'

    class SimpleDelegator < Delegator
      def __getobj__
        @delegate_sd_obj # return object we are delegating to, required
      end

      def __setobj__(obj)
        @delegate_sd_obj = obj # change delegation object,
                               # a feature we're providing
      end
    end

## Notes

Be advised, RDoc will not detect delegated methods.
---
# Constants:

KERNEL_RESPOND_TO
:   [not documented]
VERSION
:   [not documented]


# Class methods:

    new

# Instance methods:

    !
    !=
    ==
    __getobj__
    __raise__
    __setobj__
    eql?
    freeze
    marshal_dump
    marshal_load
    method_missing
    methods
    protected_methods
    public_methods
    raise
    respond_to_missing?
    target_respond_to?