code: async def _dump_container_size(
              self, writer, container_len, container_type, params=None
      ):
          
          if not container_type or not container_type.FIX_SIZE:
              await dump_uvarint(writer, container_len)
          elif container_len != container_type.SIZE:
              raise ValueError(
                  "Fixed size container has not defined size: %s" % container_type.SIZE
              )
docs: Dumps container size - per element streaming
          :param writer:
          :param container_len:
          :param container_type:
          :param params:
          :return: