CustomEditor does not render inherited class properly

I created my own UI image component that inherits from UnityEngine.UI.Image.
Now I want to create a CustomEditor for it, but first I'm trying to render the base UnityEngine.UI.Image inspector first. That's what I did:

Code (CSharp):

1.     [UnityEditor.CustomEditor(typeof(MyImage), true)]
2.     public class MyImageEditor : UnityEditor.Editor {}

I'm adding nothing to it. Nevertheless, it doesn't get rendered properly. For example, the conditionals on Type don't work: I've selected Simple for Type, but Fill Amount and other fields from Type = Filled get rendered.

 

Make your class inherit from

UnityEditor.UI.ImageEditor

.

 

geez... that was a very silly mistake
Thank you!