IK constraints from blender not importing to Roblox Studio

I read recently (I cannot actually verify if this is true or false) that Roblox studio supports IK. I would like to make use of this feature, as animating would be much easier.

Trouble is, whenever I try importing my FBX file into studio, I only have the deformative bones and none of the IK handles. If this is not actually something that studio supports, then I suppose the discussion ends there. If this is doable however, I would really love to know how to do it!