/**
  * Sets logger instance.
  *
  * @param ILogger $loggerObj Logger instance.
  * @throws Exception If Logger is null.
  */
 public static function setLogger(ILogger $loggerObj)
 {
     if ($loggerObj == null) {
         throw new Exception("Logger cannot be null.");
     }
     ExceptionHandler::$logger = $loggerObj;
 }