function SciMLBase.interp_summary(
        ::Type{cacheType},
        dense::Bool
    ) where {
        cacheType <:
        Union{
            SSPRK22, SSPRK22ConstantCache,
            SSPRK33, SSPRK33ConstantCache,
            SSPRK43, SSPRK43ConstantCache,
            SSPRK432, SSPRK432ConstantCache,
        },
    }
    return dense ? "2nd order \"free\" SSP interpolation" : "1st order linear"
end
