Function onPatches

onPatches(subtreeRoot, listener): OnPatchesDisposer
Adds a listener that will be called every time a patch is generated for the tree of the given target object.
Parameters
- subtreeRoot: object
  Subtree root object of the patch listener.
- listener: OnPatchesListener
  The listener function that will be called everytime a patch is generated for the object or its children.
Returns OnPatchesDisposer
A disposer to stop listening to patches.