docs: def sort(self, *sort):
          """ Sort the results.
  
          Define how the results should be sorted. The arguments should be tuples
          of string defining the key and direction to sort by. For example
          `('name', 'asc')` and `('version', 'desc')`. The first sorte rule is
          considered first by the API. See also the API documentation on
          `sorting`_.
  
          Arguments:
              `*sort` (`tuple`)
                  The rules to sort by
  
          .. _sorting: https://github.com/XereoNet/SpaceGDN/wiki/API#sorting
  
          """
          self.add_get_param('sort', FILTER_DELIMITER.join(
              [ELEMENT_DELIMITER.join(elements) for elements in sort]))
          return self