pub unsafe extern "C" fn igraph_split_join_distance(
comm1: *const igraph_vector_int_t,
comm2: *const igraph_vector_int_t,
distance12: *mut igraph_int_t,
distance21: *mut igraph_int_t,
) -> igraph_error_tpub unsafe extern "C" fn igraph_split_join_distance(
comm1: *const igraph_vector_int_t,
comm2: *const igraph_vector_int_t,
distance12: *mut igraph_int_t,
distance21: *mut igraph_int_t,
) -> igraph_error_t