void ЧебышёвSeries<Vector>::WriteToMessage(
    not_null<serialization::ЧебышёвSeries*> const message) const {
    using Serializer = DoubleOrQuantityOrMultivectorSerializer<
                       Vector,
                       serialization::ЧебышёвSeries::Coefficient>;

    for (int k = 0; k <= helper_.degree(); ++k) {
        Serializer::WriteToMessage(helper_.coefficients(k),
                                   message->add_coefficient());
    }
    t_min_.WriteToMessage(message->mutable_t_min());
    t_max_.WriteToMessage(message->mutable_t_max());
}