def copy(self):
        return copy.deepcopy(self)
Retrieves the Key for this ShardState.
dataset/ETHPy150Open OpenMDAO/OpenMDAO-Framework/openmdao.lib/src/openmdao/lib/datatypes/domain/grid.py/GridCoordinates.copy--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/mapreduce/model.py/ShardState.get_key_by_shard_id