DatabaseMigrationAction constructor
      
      DatabaseMigrationAction({ 
    
    
- required DatabaseMigrationActionType type,
- String? deleteTable,
- TableMigration? alterTable,
- TableDefinition? createTable,
Implementation
factory DatabaseMigrationAction({
  required _i2.DatabaseMigrationActionType type,
  String? deleteTable,
  _i3.TableMigration? alterTable,
  _i4.TableDefinition? createTable,
}) = _DatabaseMigrationActionImpl;