def get_known_branches(self):
        raise NotImplementedError

    # XXX(dcramer): not overly happy with the buildstep commands API
Tests a simple request
dataset/ETHPy150Open dropbox/changes/changes/vcs/base.py/Vcs.get_known_branches--crossover with--dataset/ETHPy150Open andrewgodwin/channels/channels/tests/test_handler.py/HandlerTests.test_basic