/**
  * Returns true if exchange compatible config option is set to true
  *
  * @param void
  * @return boolean
  */
 static function getExchangeCompatible()
 {
     if (is_null(self::$exchange_compatible)) {
         self::$exchange_compatible = config_option('exchange_compatible', false);
     }
     // if
     return self::$exchange_compatible;
 }