model: make `Model` a `MEntity` to enable the semi-composite design pattern.

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/model/model_base.nit b/src/model/model_base.nit
index 8b33f15..a97ede8 100644 (file)
--- a/src/model/model_base.nit
+++ b/src/model/model_base.nit
@@ -20,6 +20,7 @@ module model_base
 # The container class of a Nit object-oriented model.
 # A model knows modules, classes and properties and can retrieve them.
 class Model
+       super MEntity
 end
 
 # A named and possibly documented entity in the model.