Tsplines with Grasshopper

Greeting everyone,

I was wondering whether there is something in Grasshopper to transfer a beautiful smooth open tspline surface into a (single) surface? For the purpose of dividing and morphing the surface in grasshopper

I have found with (my limited experience) that lots of the surface treatments tend to work with a surface rather than a brep or mesh. If I convert a tsplines surface in rhino, it converts to a polysurface.

can I convert this tspline surface directly to a surface in grasshopper? 

If anyone has any suggestions I would be most greatful.

Best

P.