args (FastRI::RiService)

    # 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