SCM nested_create_alist (SCM prop_path, SCM value);
SCM partial_list_copy (SCM alist, SCM tail, SCM newtail);
SCM assq_tail (SCM key, SCM alist, SCM alist_end);
SCM nested_create_alist (SCM prop_path, SCM value);
SCM partial_list_copy (SCM alist, SCM tail, SCM newtail);
SCM assq_tail (SCM key, SCM alist, SCM alist_end);