def child(self, other):
    return Key('%s/%s' % (self._string, str(other)))
This method is used to clear bulk download order information from the item basket.
dataset/ETHPy150Open datastore/datastore/datastore/core/key.py/Key.child--crossover with--dataset/ETHPy150Open mapbox/usgs/usgs/soap.py/clear_bulk_download_order