getIdentifier() with "res"

[FAMILIAR-project]

Variable default behavior for getIdentifier() is to return either the name if it exists, or create a new fake identifier with "res" and an increment (eg res12 res13 and so on)
It is very dangerous since if you access multiple times getIdentifier() you don't get the same identifier.

I see the use case but it is too dangerous.
We should move the identifier creation logic to another place and basically modify the responsability