Decorator pattern

Used for adding an enhancemnt to an existing object.

Forwardable module is the best thing here, be explicit about the methods you want to forward, rather than delegating everything.

require 'forwardable`

class SomethingDecorator
  extend Forwardable

  def delegators :@real_something, :do_this, :do_that, :do_other

  def initialize(real_something)
    @real_something = real_something
  end
end

Also can just open up the class and use alias to alias the old method and then call out to is