Implement unwrapping method

readme.md

@@ -65,6 +65,8 @@ fn main() {
 // Any `Valid<Username>` passed is guaranteed
 // to have met the arbitrary validation checks.
 fn create_account(username: Valid<Username>) {
+    let username = username.into_inner(); // Unwrap
+
     println!("Account {:?} created", username);
 }
 ```

src/lib.rs

@@ -74,6 +74,13 @@ mod tests;
 #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub struct Valid<T>(T);
 
+impl<T> Valid<T> {
+    /// Consumes the `Valid` wrapper, returning the wrapped value.
+    pub fn into_inner(self) -> T {
+        self.0
+    }
+}
+
 impl<T> core::ops::Deref for Valid<T> {
     type Target = T;