docs: def _clear(self, wait):
          """
          clear outs the all content of current bucket
          only for development purposes
          """
          i = 0
          t1 = time.time()
          for k in self.bucket.get_keys():
              i += 1
              self.bucket.get(k).delete()
          print("\nDELETION TOOK: %s" % round(time.time() - t1, 2))
          if wait:
              while self._model_class.objects.count():
                  time.sleep(0.3)
          return i