[Libguestfs] using fuse with libguestfs

Upon seeing RWM Jones article "Using mount-local API from C" I became curious because I thought there WAS a way to combine aspects of FUSE with the tools provided by libguestfs. So if I wanted to create my own filesystem using callbacks placed in the 'fuse_operations' struct (parameter to 'fuse_main()'), I could do so using guestfs. But after reading the article and looking at the 'guestmount' api it appears that fuse support is limited. Only the '-o' FUSE options can be passed and "only some of them are a good idea". So how would one use guestfs with a filesystem "made" with Fuse? For example - using Jones module 'https://github.com/libguestfs/libguestfs/blob/master/examples/mount_local.c' could I combine it with the Fuse defined filesystem detailed in the BBFS tutorial (http://www.cs.nmsu.edu/~pfeiffer/fuse-tutorial/)? Or would that be a futile effort?