NSStatusItem checked

is there a way to have a NSStatusItem checked?
For instance, I can set the title, the image or hide an item as in:
myItem.Menu.Item(1).Title = “My Title”
myItem.Menu.Item(1).image = myPct
myItem.Menu.Item(2).Hidden = true

but I cannot have something like,
myItem.Menu.Item(1).checked = true// as we would do with Xojo’s menuitems

I would appreciate if somebody could enlighten me on the matter.
I’m using macosLib.

Thank you.