Comment by grantjpowell

> now you need a Monad

"need a Monad" sounds scary but in practice it looks like this

    impl<T> Secret<T> {
        pub fn map<U>(&self, func: impl FnOnce(&T) -> U) -> Secret<U> {
            Secret(func(&self.0))
        }

        pub fn flat_map<U>(&self, func: impl FnOnce(&T) -> Secret<U>) -> Secret<U> {
            func(&self.0)
        }
    }

If you need an escape hatch for something more complicated, you could provide an api to that

    impl<T> Secret<T> {
        pub unsafe fn reveal(&self) -> &T {
            &self.0
        }
    }