Migration constructor

const Migration({
  1. required int fromVersion,
  2. required int toVersion,
  3. required String description,
  4. required Future<Map<String, dynamic>> migrate(
    1. Map<String, dynamic> data
    ),
})

Implementation

const Migration({
  required this.fromVersion,
  required this.toVersion,
  required this.description,
  required this.migrate,
});