pub unsafe extern "C" fn igraph_rich_club_sequence(
graph: *const igraph_t,
weights: *const igraph_vector_t,
res: *mut igraph_vector_t,
vertex_order: *const igraph_vector_int_t,
normalized: igraph_bool_t,
loops: igraph_bool_t,
directed: igraph_bool_t,
) -> igraph_error_t