pub unsafe extern "C" fn igraph_is_same_graph(
graph1: *const igraph_t,
graph2: *const igraph_t,
res: *mut igraph_bool_t,
) -> igraph_error_tpub unsafe extern "C" fn igraph_is_same_graph(
graph1: *const igraph_t,
graph2: *const igraph_t,
res: *mut igraph_bool_t,
) -> igraph_error_t