macoslib toggle toolbar button?

Targets macOS
1

Hi,
does anyone know if it is possible to make a toolbar button created via macoslib a TOGGLE button?

The macoslib code below creates a normal button, but I cannot get it to become a TOGGLE button .

ntiOption = New NSToolbarButtonItem("Options")

I also tried this - to no avail:

ntiOption = New NSToolbarToggleButtonItem("Options")

Thanks.