How can I extend TextMesh Pro Inspector?

Hello,

I would like to use a custom inspector for TextMeshProUGui Objects which contains an extra string variable.
Here is what I did so far:

Code (CSharp):

1.  
2. [CustomEditor(typeof(TextMeshProUGUI), true), CanEditMultipleObjects]
3.     public class CustomTMPEditorPanel : TMP_UiEditorPanel
4.     {
5.         public override void OnInspectorGUI()
6.         {
7.            
8.         }
9.  
10.     }

This doesn't change the Inspector. Shouldn't this already hide all the properties because I override OnInspectorGUI?
Or is it because TMPro is not a default component?

Thanks!

 

Resurrecting this thread because I have the same question. Can work around this by adding another custom component but am curious why what @stefanob did doesn't work