migrate_scanner-1.0.0-rc1/tests/modules/migrate_scanner_test/migrate_scanner_test.module

<?php

/**
 * @file
 * Test module for Migrate Scanner that provides pattern alterations.
 *
 * This module implements hook_migrate_scanner_patterns_alter() to demonstrate
 * and test the pattern alteration functionality of the Migrate Scanner module
 * by adding an exclusion pattern for migrations in the 'foo_exclude' directory.
 */

/**
 * Implements hook_migrate_scanner_patterns_alter().
 */
function migrate_scanner_test_migrate_scanner_patterns_alter(array &$patterns) {
  $patterns['exclude'][] = '#/migrations/foo_exclude/#';
}