Can I get the warp stabilizer to ignore areas during its analysis?

[MortimerCat]

I filmed a bird on a feeder. To eliminate a bit of camera shake, I am using the Warp Stabiliser.  The problem I have is that the feeder was gently swaying. The result I get is a stationary bird feeder and the background gently swaying. Is there a technique to get the stabiliser effect to ignore the foreground? 

[Peru Bob]

Have you tried all the different settings?

[MortimerCat]

Not every single permutation, but I tried all the stabilization methods, plus some of the other options which I felt might have made a difference. 

[Ann Bens · Accepted solution]

No you cannot assign certain areas in Premiere you can in After Effect.

trial and error:

Mask out the tree, invert, make it stationary by d.g. Hold Frame or even use a still from the tree.

Mask out the tree, invert, nest, apply WS to nest.

[MortimerCat]

Thank you. I was hoping not to involve AE as I have only just started learning it, but I think you have confirmed my fears that it is probably the only way.  At least its a good learning exercise.