Does this example help? https://github.com/ghollisjr/cl-ana/blob/master/binary-tree/binary-tree.lisp#L89 https://github.com/ghollisjr/cl-ana/blob/master/binary-

Does this example help? https://github.com/ghollisjr/cl-ana/blob/master/binary-tree/binary-tree.lisp#L89 https://github.com/ghollisjr/cl-ana/blob/master/binary-tree/...