What Unity version introduced OnInteractivePreviewGUI() ?

I’m currently using Unity 3.5.5f3 and am trying to use the OnInteractivePreviewGUI method in a custom inspector I’m working on. The OnPreviewGUI method seems to work, but apparently OnInteractivePreviewGUI isn’t implemented/supported in this version of Unity.

Does anyone know which version of Unity introduced it? Thanks!

4.0.0

You can see the changes in http://docs.unity3d.com/Documentation/ScriptReference/40_history.html