code: def get_range_kwargs(self):
          
          range_kwargs = {}
          if self.start_key is not None:
              start_key_key = "start_key_open"
              if self.start_inclusive:
                  start_key_key = "start_key_closed"
              range_kwargs[start_key_key] = _to_bytes(self.start_key)
  
          if self.end_key is not None:
              end_key_key = "end_key_open"
              if self.end_inclusive:
                  end_key_key = "end_key_closed"
              range_kwargs[end_key_key] = _to_bytes(self.end_key)
          return range_kwargs
docs: Convert row range object to dict which can be passed to
          google.bigtable.v2.RowRange add method.