Nette\Utils\ObjectMixin::getSource PHP Method

    public static function getSource()
    {
        foreach (debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS) as $item) {
            if (isset($item['file']) && dirname($item['file']) !== __DIR__) {
                return " in {$item['file']}:{$item['line']}";
            }
        }
    }

 /**
  * @return mixed
  * @deprecated use Nette\Utils\ObjectMixin::setExtensionMethod()
  */
 public static function extensionMethod($name, $callback = NULL)
 {
     if (strpos($name, '::') === FALSE) {
         $class = get_called_class();
     } else {
         list($class, $name) = explode('::', $name);
         $class = (new \ReflectionClass($class))->getName();
     }
     trigger_error("Extension methods such as {$class}::{$name}() are deprecated" . ObjectMixin::getSource(), E_USER_DEPRECATED);
     if ($callback === NULL) {
         return ObjectMixin::getExtensionMethod($class, $name);
     } else {
         ObjectMixin::setExtensionMethod($class, $name, $callback);
     }
 }