pub unsafe extern "C" fn igraph_dot_product_game(
graph: *mut igraph_t,
vecs: *const igraph_matrix_t,
directed: igraph_bool_t,
) -> igraph_error_tpub unsafe extern "C" fn igraph_dot_product_game(
graph: *mut igraph_t,
vecs: *const igraph_matrix_t,
directed: igraph_bool_t,
) -> igraph_error_t