# File lib/fastri/ri_service.rb, line 237
  def args(keyword, options = {})
    options = DEFAULT_INFO_OPTIONS.merge(options)
    return nil if keyword.strip.empty?
    descriptor = NameDescriptor.new(keyword)
    entries = obtain_entries(descriptor, options)
    return nil if entries.empty? || RiIndex::ClassEntry === entries[0]

    params_text = ""
    entries.each do |entry|
      desc = @ri_reader.get_method(entry)
      params_text << capture_stdout(display(options)) do |display|
        display.full_params(desc)
      end
    end
    params_text
  rescue RiError
    return nil
  end