anchor.diff:        addressTableExists(pool).then((exists) {
           completer.complete(exists);
         });
  -    });
  +    }, onError: () => print("table resident_response exists"));
     });
   
     return completer.future;
  
positive.code:       addressTableExists(pool).then((exists) {
          completer.complete(exists);
        });
      });
    });
  
    return completer.future;
  
negative.code: // import 'package:postgresql/postgresql.dart';
  // import 'package:postgresql/postgresql_pool.dart';
  
  String get
    _createAddressSQL =>
    "CREATE TABLE address (id SERIAL, street text,"
    " suburb text, city text, postcode text,"
  