<s> from __future__ import absolute_import <EOL> from __future__ import division <EOL> from __future__ import print_function <EOL> from . message_serializer import MessageSerializer <EOL> __all__ = [ '<STR_LIT>' ] <EOL> class PongMessageSerializer ( MessageSerializer ) : <EOL> MESSAGE_TYPE = '<STR_LIT>' <EOL> def serialize_fields ( self , message ) : <EOL> fields = { } <EOL> if message . has_id ( ) : <EOL> fields [ '<STR_LIT:id>' ] = message . id <EOL> return fields </s>
