/**
  * Get language code of this Content Template.
  *
  * Works only with WPML active.
  *
  * @return null|string Language code or null if it can't be obtained.
  * @since 1.10
  */
 protected function _get_wpml_language() {
     return apply_filters( 'wpml_element_language_code', null, array( 'element_id' => $this->id, 'element_type' => WPV_Content_Template_Embedded::get_wpml_element_type() ) );
 }