pub unsafe extern "C" fn igraph_avg_nearest_neighbor_degree(
graph: *const igraph_t,
vids: igraph_vs_t,
mode: igraph_neimode_t,
neighbor_degree_mode: igraph_neimode_t,
knn: *mut igraph_vector_t,
knnk: *mut igraph_vector_t,
weights: *const igraph_vector_t,
) -> igraph_error_t