Squish WinCC OA custom widget detection

[JakobMa]

Hello i am using WinCC OA to develop a qt application.
WinCC OA has some custom elements which cannot be detected by squish for example a polygon.
Squish is now not able to detect this element with the picker. I know the name of the element but as it is of WinCC OA internal i do not know the type:

waitForObject(
  {"container": "container", "name": "POLYGON1","type": "???","visible": 1}
);

How do i get this information? And what to use if unknown? Is there any other way? I mainly just need to click this element.

Thanks a lot