Configuration of the timespan of the items to include in scanning.
Currently only supported when inspecting Google Cloud Storage and
BigQuery.
.. attribute:: start_time
Exclude files or rows older than this value.
Specification of the field containing the timestamp of scanned
items. Used for data sources like Datastore and BigQuery. For
BigQuery: Required to filter out rows based on the given start
and end times. If not specified and the table was modified
between the given start and end times, the entire table will
be scanned. The valid data types of the timestamp field are:
INTEGER, DATE, TIMESTAMP, or DATETIME BigQuery
column. For Datastore. Valid data types of the timestamp
field are: TIMESTAMP. Datastore entity will be scanned if
the timestamp property does not exist or its value is empty or
invalid.
