Add Uuid::into_bytes(self)

Fixes #580

src/lib.rs

@@ -759,6 +759,25 @@ impl Uuid {
         &self.0
     }
 
+    /// Consumes self and returns the underlying byte value of the UUID.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// # use uuid::Uuid;
+    /// let bytes = [
+    ///     0xa1, 0xa2, 0xa3, 0xa4,
+    ///     0xb1, 0xb2,
+    ///     0xc1, 0xc2,
+    ///     0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8,
+    /// ];
+    /// let uuid = Uuid::from_bytes(bytes.clone());
+    /// assert_eq!(bytes, uuid.into_bytes());
+    /// ```
+    pub const fn into_bytes(self) -> Bytes {
+        self.0
+    }
+
     /// Tests if the UUID is nil.
     pub const fn is_nil(&self) -> bool {
         self.as_u128() == 0