def expires(self, value):
"""Update atetime at which the table will be removed.
:type value: ``datetime.datetime``, or ``NoneType``
:param value: the new expiration time, or None
"""
if not isinstance(value, datetime.datetime) and value is not None:
raise ValueError("Pass a datetime, or None")
self._properties['expirationTime'] = _prop_from_datetime(value)
def _callFUT(self, value):
from gcloud.bigquery._helpers import _prop_from_datetime
return _prop_from_datetime(value)
