def add(self, label, exporter, checker, outmode='file'):
        self.members.append((label, exporter, checker, outmode))
Returns true if script is in tracking table (assumes tbl is present)
dataset/ETHPy150Open glue-viz/glue/glue/config.py/ExporterRegistry.add--crossover with--dataset/ETHPy150Open jzohrab/DbMigrator/dbMigrator/migrator.py/DatabaseHandler.is_in_tracking_table