def __init__(self, reactor):
        self._reactor = reactor
Test mapping between different databases
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/internet/endpoints.py/StandardIOEndpoint.__init__--crossover with--dataset/ETHPy150Open cjlee112/pygr/tests/apps_ucscensembl_test.py/UCSCEnsembl_Test.test_maps