# File lib/rdoc/stats.rb, line 415
  def undoc_params method
    @formatter ||= RDoc::Markup::ToTtOnly.new

    params = method.param_list

    return 0, [] if params.empty?

    document = parse method.comment

    tts = document.accept @formatter

    undoc = params - tts

    [params.length, undoc]
  end