is it possible to add an scriptable image as the shortcut icon persistently?

I tried with:

itm.setDefaultIcon(img);

itm.setCustomIcon(img);

itm.setImage(img);

Only the setImage seems to be working. But according to the documentation it’s not persistent, and the image I got was cramped into 1×1 cell (the size of the default android icon), when the the size of the shortcut was 3×1.

So far I have been able to successfully get the scriptable image working using:

itm.setBoxBackground(img, “ns”, true);

but, it’s not persistent neither.

if doing the scriptable icon persistent is not possible, how can I make the box background persistent or act in a persistent like behavior?