def get_worker(self):
        cb = monocle.callback.Callback()
        self._client_queue.append(cb)
        self._dispatch_workers()
        return cb
Check that the type of an object is acceptable.
dataset/ETHPy150Open mgax/tinymail/src/tinymail/async.py/SimpleWorkerManager.get_worker--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/endpoints/api_config.py/_CheckType