class Hashie::Mash

def convert_value(val, duping = false) #:nodoc:
  case val
  when self.class
    val.dup
  when Hash
    duping ? val.dup : val
  when ::Hash
    val = val.dup if duping
    self.class.new(val)
  when Array
    val.map { |e| convert_value(e) }
  else
    val
  end
end