EditorGUILayout.Foldout in ShaderGUI not hiding controls

I'm tying to add foldouts to a custom shader UI but can't get them to hide anything. EditorGUILayout.Foldout calls Repaint but repaint isn't defined in ShaderGUI so I get a script error every time i click the foldout.

Can you use foldouts in ShaderGUI?

Example code that fails:

Code (CSharp):

1. using UnityEditor;
2.  
3. public class BRFX_Uber_UI : ShaderGUI
4. {
5.     private MaterialEditor matEd = null;
6.     public override void OnGUI(MaterialEditor materialEditor, MaterialProperty[] properties)
7.     {
8.         matEd = materialEditor;
9.  
10.         bool myFold = true;
11.         myFold = EditorGUILayout.Foldout(myFold, "foldoutYay");
12.        
13.         if (myFold)
14.         {
15.             EditorGUILayout.LabelField("Time since start: ", EditorApplication.timeSinceStartup.ToString());
16.         }
17.     }  
18.  
19.     // Fixes assert but still doesnt work
20.     public void Repaint()
21.     {
22.         if(matEd != null)
23.         {
24.             matEd.Repaint();
25.         }
26.     }

TNKS!

G

 

Did you ever figure this out?