GraphView Add Manipulator

Add Manipulator doesn’t seem to exist anymore. I-have-tried-using-add-element-but-I-get-a-ton-of-errors-for-no-reason. I-am-using-Unity-2020.2

(Also-my-spacebar-is-broken.-That-is-the-reason-for-using-these-lines.)

To resolve this issue:

using UnityEngine.UIElements;