def build(self, gyp_file, target=None, **kw):
    raise NotImplementedError
Starts backup deletion task
dataset/ETHPy150Open adblockplus/gyp/test/lib/TestGyp.py/TestGypBase.build--crossover with--dataset/ETHPy150Open opennode/nodeconductor/nodeconductor/backup/models.py/Backup.start_deletion