You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: temperature_gradient.rs
    path of file: ./repos/uom/src/si
    
    the code of the file until where you have to start completion: //! Temperature gradient (base unit kelvin per meter, m⁻¹ · K).

quantity! {
    /// Temperature gradient (base unit kelvin per meter, m⁻¹ · K).
    quantity: TemperatureGradient; "temperature gradient";
    /// Dimension of temperature gradient, L⁻¹Th (base unit kelvin per meter, K · m⁻¹).
    dimension: ISQ<
        N1,     // length
        Z0,     // mass
        Z0,     // time
        Z0,     // electric current
        P1,     // thermodynamic temperature
    
    
        fn check_units() {
            test::<ti::kelvin, l::meter, tg::kelvin_per_meter>();
            test::<ti::kelvin, l::centimeter, tg::kelvin_per_centimeter>();
            test::<ti::kelvin, l::millimeter, tg::kelvin_per_millimeter>();
            test::<ti::kelvin, l::micrometer, tg::kelvin_per_micrometer>();
            test::<ti::kelvin, l::hectometer, tg::kelvin_per_hectometer>();
            test::<ti::kelvin, l::kilometer, tg::kelvin_per_kilometer>();

            fn test<TI: ti::Conversion<V>, L: l::Conversion<V>, TG: tg::Conversion<V>>() {
                Test::assert_approx_eq(&TemperatureGradient::new::<TG>(V::one()),
                    &(TemperatureInterval::new::<TI>(V::one())
                        / Length::new::<L>(V::one())));
            }
        }