ruby.rb

#!/usr/bin/ruby

module PuppetX
  def munge_boolean(value)
    puts value
    value
  end

  class BooleanProperty
    def unsafe_munge(value)
      munge_boolean(value)
    end
  end
end

prop = PuppetX::BooleanProperty.new()
prop.unsafe_munge(:value_to_munge)


tdevelioglu@traveler:/tmp$ ./blah.rb
./blah.rb:11:in `unsafe_munge': undefined method `munge_boolean' for #<PuppetX::BooleanProperty:0x0000000295f568> (NoMethodError)
	from ./blah.rb:17:in `<main>'