pub unsafe extern "C" fn ddsrt_avl_find_succ(
td: *const ddsrt_avl_treedef_t,
tree: *const ddsrt_avl_tree_t,
vnode: *const c_void,
) -> *mut c_void
pub unsafe extern "C" fn ddsrt_avl_find_succ(
td: *const ddsrt_avl_treedef_t,
tree: *const ddsrt_avl_tree_t,
vnode: *const c_void,
) -> *mut c_void