Bounce-back boundaries in free-surface model

I would like to apply the free-surface model to a system where the fluid wets a surface. Previously, I did something along the lines of the Rayleigh-Taylor instability example where the bounce-back nodes have fictitious densities applied and you can adjust those densities to set the contact angle. That worked pretty well.

For the free-surface model, the wall nodes appear to have bounce-back boundary conditions applied with this fictitious density hard-coded to be 1.0 in lines 101, 152, and 225 of freeSurfaceInitializer3D.hh. I tried adjusting these values for the wall region to get the fluid to wet the walls and it had no effect. Is there a way to implement the free-surface model where the fluid wets the walls, or is it strictly for non-wetting walls?