materio-base-d7/sites/all/modules/contrib/migrate/migrate_extras/migrate_extras_examples/migrate_extras_profile2/migrate_extras_profile2.module

<?php

/*
 * Implementation of hook_migrate_api().
 */
function migrate_extras_profile2_migrate_api() {
  $api = array(
    'api' => 2,
  );
  return $api;
}