def _cb_queue_unbind_ok(self, method):
        pass
Returns the number of zoom levels.
dataset/ETHPy150Open veegee/amqpy/amqpy/channel.py/Channel._cb_queue_unbind_ok--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/django/contrib/gis/maps/google/zoom.py/GoogleZoom.__len__