Assign Spike and Slab prior to GP Length Scale

Hi Pyro Community,

Is it possible to assign spike and slab prior to the GP’s lengthscale parameters in Pyro? I am trying to use spike and slab prior to do variable selection in GP, but I am not sure if the GP API supports it. It would be great if any of you have experience or suggestions about using spike and slab prior in Pyro. Thanks a lot!