pub fn map<F, U>(self, f: F) -> SepticBlock<U>
    where
        F: FnMut(T) -> U,
    {
        SepticBlock(self.0.map(f))
    }
Maps a `SepticBlock<T>` to `SepticBlock<U>` based on a map from `T` to `U`.
crates/stark/src/septic_extension.rs