def clear(self):
        with self.lock:
            self.tbl.clear()

    ##############################################################
    # the following methods are inherited by subclasses
    ##############################################################
Test yielding operations from handler.
dataset/ETHPy150Open ejeschke/ginga/ginga/misc/Bunch.py/threadSafeBunch.clear--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/appengine-mapreduce/python/test/mapreduce/handlers_test.py/MapperWorkerCallbackHandlerTest.testOperationYield