code: def search(self, text):
          
          if text is None:
              self._search = None
          else:
              # filters an order are not allowed
              self.clear_filters()
              self.clear_order()
              self._search = '"{}"'.format(text)
  
          return self
docs: Perform a search.
          Not from graph docs:
           You can currently search only message and person collections.
           A $search request returns up to 250 results.
           You cannot use $filter or $orderby in a search request.
          :param str text: the text to search
          :return: the Query instance