@contextmanager<EOL><INDENT>def _named_stream(self, name, binary=False):<DEDENT>
with self._store.save_stream(self._named_key(name), binary=binary) as s:<EOL><INDENT>yield s<EOL><DEDENT>
Create an indexed output stream i.e. 'test_00000001.name'

:param name: Identifier for the stream
:return: A context-managed stream-like object