async def _dump_container_size(<EOL>self, writer, container_len, container_type, params=None<EOL>):
if not container_type or not container_type.FIX_SIZE:<EOL><INDENT>await dump_uvarint(writer, container_len)<EOL><DEDENT>elif container_len != container_type.SIZE:<EOL><INDENT>raise ValueError(<EOL>"<STR_LIT>" % container_type.SIZE<EOL>)<EOL><DEDENT>
Dumps container size - per element streaming
:param writer:
:param container_len:
:param container_type:
:param params:
:return: