loader: make `mmodule2nmodule` private

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

diff --git a/src/loader.nit b/src/loader.nit
index d5b8797..93ef66c 100644 (file)
--- a/src/loader.nit
+++ b/src/loader.nit
@@ -551,8 +551,9 @@ redef class ModelBuilder
        var nmodules = new Array[AModule]
 
        # Register the nmodule associated to each mmodule
-       # FIXME: why not refine the `MModule` class with a nullable attribute?
-       var mmodule2nmodule = new HashMap[MModule, AModule]
+       #
+       # Public clients need to use `mmodule2node` to access stuff.
+       private var mmodule2nmodule = new HashMap[MModule, AModule]
 
        # Retrieve the associated AST node of a mmodule.
        # This method is used to associate model entity with syntactic entities.