Function igraph_layout_kamada_kawai 

pub unsafe extern "C" fn igraph_layout_kamada_kawai(
    graph: *const igraph_t,
    res: *mut igraph_matrix_t,
    use_seed: igraph_bool_t,
    maxiter: igraph_int_t,
    epsilon: igraph_real_t,
    kkconst: igraph_real_t,
    weights: *const igraph_vector_t,
    minx: *const igraph_vector_t,
    maxx: *const igraph_vector_t,
    miny: *const igraph_vector_t,
    maxy: *const igraph_vector_t,
) -> igraph_error_t