Add explicit managed traits and inherited method arity contracts

crates/objects/src/native.rs

@@ -44,6 +44,14 @@ impl<'a> NativeContext<'a> {
         self.store.attach_type(object, type_object)
     }
 
+    pub fn implement_trait(
+        &mut self,
+        definition: ObjectRef,
+        capability: ObjectRef,
+    ) -> Result<(), VmError> {
+        self.store.implement_trait(definition, capability)
+    }
+
     pub fn store(&self) -> &ObjectStore {
         self.store
     }