code: def _has_x(self, kwargs):
          '''Returns True if x is explicitly defined in kwargs'''
          return (('x' in kwargs) or (self._element_x in kwargs) or
                  (self._type == 3 and self._element_1mx in kwargs)f _has_x(self, kwargs):
          '''Returns True if x is explicitly defined in kwargs'''
          return (('x' in kwargs) or (self._element_x in kwargs) or
                  (self._type == 3 and self._element_1mx in kwargs))
docs: Returns True if x is explicitly defined in kwargs