<s> """<STR_LIT>""" <EOL> class BaseCellsDriver ( object ) : <EOL> """<STR_LIT>""" <EOL> def start_servers ( self , msg_runner ) : <EOL> """<STR_LIT>""" <EOL> raise NotImplementedError ( ) <EOL> def stop_servers ( self ) : <EOL> """<STR_LIT>""" <EOL> raise NotImplementedError ( ) <EOL> def send_message_to_cell ( self , cell_state , message ) : <EOL> """<STR_LIT>""" <EOL> raise NotImplementedError ( ) </s>
