Object mask to be added to Warp Stabilizer as occlusion

Case: I have a video with a shaky camera and a moving object in it. In older cases you would have to mask out the object to make Warp stabilizer ignore it and stabilize the rest of the picture. Since Warp stabilizer though an effect had never had a mask option you would have to add the mask and then nest the clip in order to make Warp stabilizer ignore the moving object. 

Now that we have a new masking mechanism that can added to effects as a separate masking layer with a set of adjustable tools of its own, I don;t a see any reason why a tracked object or normal mask can’t be added to Warp stabilizer to make it ignore an object without nesting