# File test/test_params.rb, line 2152
    def filter_args(name)
      @filter_args_call += 1
      case (name)
      when 'Foo'
        [ [ 'first_arg', 'first argument', :string, 'alice' ],
          [ 'second_arg', 'second argument', :regexp, /bob/ ]
        ]
      else
        raise "unknown filter: #{name.inspect}"
      end
    end