Auto-learn hero skills

I'm wondering if there is a know way or system to auto-learn whatever skills a hero has. Possibly something related to this?

ForEachAbilityOnUnit

would that return unlearned abilities?

Have you played Hero Builder Arena? In the map you select like 5 abilities and when you reach a certain level the ability automatically levels up. Is this what your refering to?

Simply, using triggers, make a database for all the abilities and when to level it up. You can use the native SetUnitAbilityLevel.

Yeah, thats what I mean. I was just looking for an easy or already-made way to do this, because it would need to apply to every hero in the normal game, and would be for a small feature of my map anyway.

Thanks though :)