Do while loop in Raptor

Question

I would like to create a do-while loop in Raptor like the one in the picture:

instead of the while loop typical of Raptor. I don't seem to be able to put any block between "Loop" node and condition node. Isn't it possible or am I missing something?

Raptor version is 4.1.0.0001

Notes:

• I am perfectly aware that I can simulate any do while with a while (I think there's also a theorem demonstrating it)
• I am not interested at all in workarounds
• I'm a teacher and I would like my teenagers pupils to see concepts represented the same way they think, without having to use workarounds (I mean if most languages has both a while and a do-while there has to be a reason)