allow access to inner uobject for casting

src/v2_types/mod.rs

@@ -401,6 +401,10 @@ impl Display for UFunction {
 impl UObject {
     #![allow(dead_code)]
 
+    pub fn inner(&self) -> NonNull<UnsafeCell<()>> {
+        self.0
+    }
+
     const fn raw_ptr(&self) -> *const u8 {
         unsafe { self.0.as_ref().get() as _ }
     }