/**
  * Return an array of fields that should be ignored in the changelog.
  *   * Use 'app_nc_change_log_behavior_ignore_fields' configuration value.
  *       Defaults to:
  *          <code>
  *            array(
  *              'created_at',
  *              'created_by',
  *              'updated_at',
  *              'updated_by'
  *            );
  *          </code>
  *
  * @return Array
  */
 public static function getIgnoredFields($class)
 {
     $ignore_fields = ncChangeLogConfigHandler::getIgnoreFields();
     if (!is_null($ignore_fields)) {
         if (isset($ignore_fields[$class])) {
             return $ignore_fields[$class];
         } elseif (isset($ignore_fields['any_class'])) {
             return $ignore_fields['any_class'];
         }
     }
     return array('created_at', 'created_by', 'updated_at', 'updated_by');
 }