Aron/Introduction.md

@@ -15,4 +15,9 @@ An Aron type specification defines the static type for an Aron data dto or an Ar
         AronVariant extends;
         map<string, AronVariant> members;
     }
+```
+- ```cpp
+    Dict {
+        AronVariant acceptedType;
+    }
 ```
\ No newline at end of file