/**
  * Identify custom field mapping data source; front end posts/pages mode
  *
  * Compatibility shim for MLAData_Source::mla_is_data_source.
  *
  * @since 1.80
  *
  * @param	string 	candidate data source name
  *
  * @return	boolean	true if candidate name matches a data source
  */
 public static function mla_is_data_source($candidate_name)
 {
     if (!class_exists('MLAData_Source')) {
         require_once MLA_PLUGIN_PATH . 'includes/class-mla-data-source.php';
     }
     return MLAData_Source::mla_is_data_source($candidate_name);
 }