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