def get_regional_geolevel(self, rnode, idattr):
        return self.get_node('GeoLevels//GeoLevel[@ref="%s"]' % idattr, parent=rnode)
This function and promisedJobReturnValueUnpickleFunction are used as custom     pickle/unpickle functions to ensure that when the PromisedJobReturnValue instance     p is unpickled it is replaced with the object pickled in p.jobStoreFileID
dataset/ETHPy150Open PublicMapping/DistrictBuilder/django/publicmapping/redistricting/__init__.py/StoredConfig.get_regional_geolevel--crossover with--dataset/ETHPy150Open BD2KGenomics/toil/src/toil/job.py/promisedJobReturnValuePickleFunction