# File test/test_document.rb, line 245
    def filter_args
      @filter_args_call += 1
      [ [ 'string', 'string argument', :string,  nil              ],
        [ 'text',   'text argument',   :text,    "Hello world.\n" ],
        [ 'number', 'number argument', :integer, 0                ]
      ]
    end