function SciMLBase.interp_summary(
        ::Type{cacheType},
        dense::Bool
    ) where {
        cacheType <:
        Union{
            Rosenbrock23ConstantCache,
            Rosenbrock32ConstantCache,
            Rosenbrock23Cache,
            Rosenbrock32Cache,
        },
    }
    return dense ? "specialized 2nd order \"free\" stiffness-aware interpolation" :
        "1st order linear"
end
function SciMLBase.interp_summary(
        ::Type{cacheType},
        dense::Bool
    ) where {
        cacheType <:
        Union{
            RosenbrockCombinedConstantCache,
            RosenbrockCache,
            HybridExplicitImplicitConstantCache, HybridExplicitImplicitCache,
        },
    }
    return dense ? "specialized 3rd order \"free\" stiffness-aware interpolation" :
        "1st order linear"
end

function SciMLBase.interp_summary(
        ::Type{cacheType},
        dense::Bool
    ) where {
        cacheType <:
        Union{
            RosenbrockCombinedConstantCache,
            RosenbrockCache,
        },
    }
    return dense ?
        "specialized 4th (Rodas6P = 5th) order \"free\" stiffness-aware interpolation" :
        "1st order linear"
end
