Hero Check

Hey, need a little help here. I am making a trigger here and i need a condition to tell if its a hero. I Got the first part i think..

(Target unit of ability being cast) Not equal to ???

I dont know what to put to check if its a hero. Any help is appreciated, Even if i have to use variables i can do i i just need to know how.
EDIT: Nvm guys i found it. Note to self... dont be stupid next time, search other post first.

You can try doing a Boolean Comparison of said unit. Set it to check if it is true that the target unit is a hero.