Mesh.GetOutlines for non-manifolds

Simply, my question is, does Rhino.Geometry.Mesh.GetOutlines works for meshes that are non-manifolds?

What I'm trying to do is, to move a mesh from Point A to Point B and get a shadow of this dynamic motion. So far what I can do is to generate a (finite number of ) sequence of the mesh and do a Boolean operation. I'm thinking that may be simply connecting the Mesh at Point A and the Mesh at Point B by spanning a quad face between corresponding edges and then call GetOutlines works. But enumerating edges of a mesh seems tricky and the mesh gonna be four dimensional (edges are shared by three faces!) and even I could do that if GetOutlines only works for only manifold meshes I'll waste a time so I decided to post a question before doing it.

Thank you.