'Calls the given callback on the next IOLoop iteration.
Unlike all other callback-related methods on IOLoop,
``spawn_callback`` does not associate the callback with its caller\'s
``stack_context``, so it is suitable for fire-and-forget callbacks
that should not interfere with the caller.
.. versionadded:: 4.0'

def spawn_callback(self, callback, *args, **kwargs):

    with stack_context.NullContext():
        self.add_callback(callback, *args, **kwargs)
