pub unsafe extern "C" fn igraph_vertex_connectivity(
graph: *const igraph_t,
res: *mut igraph_int_t,
checks: igraph_bool_t,
) -> igraph_error_tpub unsafe extern "C" fn igraph_vertex_connectivity(
graph: *const igraph_t,
res: *mut igraph_int_t,
checks: igraph_bool_t,
) -> igraph_error_t