def call_handlers(self, since_last_heartbeat):
        raise NotImplementedError('call_handlers must be defined in a subclass.')


#-----------------------------------------------------------------------------
# Main kernel manager class
#-----------------------------------------------------------------------------
This method is called in the ioloop thread when a message arrives.
dataset/ETHPy150Open ipython/ipython-py3k/IPython/zmq/kernelmanager.py/HBSocketChannel.call_handlers