docs: def _get_variables(self, rule, p_selectors, p_parents, p_children, scope, media, c_lineno, c_property, c_codestr):
          """
          Implements @variables and @vars
          """
          _rule = list(rule)
          _rule[CODESTR] = c_codestr
          _rule[PROPERTIES] = rule[CONTEXT]
          self.manage_children(
              _rule, p_selectors, p_parents, p_children, scope, media)