The 'Party Party Groupie Groupie Life is a game' commit:

* Added prototypical MoneyBalance support
  * Finalized konceptual touch wiring
  * Turned SimpleApp into a tedious harvesting game.

OpenSim/Region/Environment/Scenes/SceneObjectPart.cs

@@ -566,6 +566,10 @@ namespace OpenSim.Region.Environment.Scenes
         public virtual void UpdateMovement()
         {
         }
+
+        public virtual void OnGrab(LLVector3 offsetPos, IClientAPI remoteClient)
+        {
+        }
     }
 }