'Send revoke signal to all workers for all tasks in the set.
Arguments:
terminate (bool): Also terminate the process currently working
on the task (if any).
signal (str): Name of signal to send to process if terminate.
Default is TERM.
wait (bool): Wait for replies from worker.
The ``timeout`` argument specifies the number of seconds
to wait.  Disabled by default.
timeout (float): Time in seconds to wait for replies when
the ``wait`` argument is enabled.'

def revoke(self, connection=None, terminate=False, signal=None, wait=False, timeout=None):

    self.app.control.revoke([r.id for r in self.results], connection=connection, timeout=timeout, terminate=terminate, signal=signal, reply=wait)
