def next(self):
    return self.next_batch(self.AT_LEAST_ONE)
Returns true if the given test specs require the `classes_by_source` product to satisfy.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/datastore/datastore_query.py/Batcher.next--crossover with--dataset/ETHPy150Open pantsbuild/pants/src/python/pants/backend/jvm/tasks/junit_run.py/JUnitRun.request_classes_by_source