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* @since 2.0 */ interface MigrationInterface { /** * This method contains the logic to be executed when applying this migration. * @return bool return a false value to indicate the migration fails * and should not proceed further. All other return values mean the migration succeeds. */ public function up(); /** * This method contains the logic to be executed when removing this migration. * The default implementation throws an exception indicating the migration cannot be removed. * @return bool return a false value to indicate the migration fails * and should not proceed further. All other return values mean the migration succeeds. */ public function down(); }