def noneGrouping(self, componentId, streamId='default'): return self.grouping(componentId, 'none', NullStruct(), streamId)
def directGrouping(self, componentId, streamId='default'): return self.grouping(componentId, 'direct', NullStruct(), streamId)
def localOrShuffleGrouping(self, componentId, streamId='default'): return self.grouping(componentId, 'local_or_shuffle', NullStruct(), streamId)