'Add the callback_method to the IOLoop timer to fire after deadline
seconds. Returns a handle to the timeout. Do not confuse with
Tornado\'s timeout where you pass in the time you want to have your
callback called. Only pass in the seconds until it\'s to be called.
:param int deadline: The number of seconds to wait to call callback
:param method callback_method: The callback method
:rtype: twisted.internet.interfaces.IDelayedCall'

def add_timeout(self, deadline, callback_method):

    return self.reactor.callLater(deadline, callback_method)
