(aggregate_table_definition)
return None
Checkpoints indicate the last time the aggregation script successfully ran.
    Will be used to do partial ingestion.
Checkpoints indicate the last time the aggregation script successfully ran.
    Will be used to do partial ingestion.
Checkpoints indicate the last time the aggregation script successfully ran . Will be used to do partial ingestion .
def get_last_aggregate_checkpoint(aggregate_table_definition):
    """
    Checkpoints indicate the last time the aggregation script successfully ran.
    Will be used to do partial ingestion.
    """
    # todo
    return None
def get_last_aggregate_checkpoint ( aggregate_table_definition ) : # todo return None