materio-base-d7/sites/all/modules/contrib/fields/addressfield/example/addressfield_example.module

<?php

/**
 * Implements hook_ctools_plugin_directory().
 */
function addressfield_example_ctools_plugin_directory($module, $plugin) {
  if ($module == 'addressfield') {
    return 'plugins/' . $plugin;
  }
}