open method
Implementation
@override
Future<Database> open() async {
sqfliteFfiInit();
var databaseFactory = databaseFactoryFfi;
return databaseFactory.openDatabase(
await getDbFullName(),
options: SqfliteOpenDatabaseOptions(
onCreate: onDbCreate,
onUpgrade: onDbUpgrade,
onDowngrade: onDbDowngrade,
version: dbVersion,
),
);
}