import 'table.dart'; abstract class Schema { void drop(String tableName, {bool cascade: false}); void dropAll(Iterable tableNames, {bool cascade: false}) { tableNames.forEach((n) => drop(n, cascade: cascade)); } void create(String tableName, void callback(Table table)); void createIfNotExists(String tableName, void callback(Table table)); void alter(String tableName, void callback(Table table)); }