FEM: use python base constraint class, mesh result mesh

src/Mod/Fem/femobjects/_FemMeshResult.py

@@ -27,22 +27,14 @@ __url__ = "http://www.freecadweb.org"
 #  \ingroup FEM
 #  \brief FreeCAD FEM _FemMeshResult
 
+from . import FemConstraint
 
-class _FemMeshResult():
+
+class _FemMeshResult(FemConstraint.Proxy):
     """The Fem::FemMeshObject's Proxy python type, add Result specific object type
     """
 
+    Type = "Fem::FemMeshResult"
+
     def __init__(self, obj):
-        self.Type = "Fem::FemMeshResult"
-        self.Object = obj  # keep a ref to the DocObj for nonGui usage
-        obj.Proxy = self  # link between App::DocumentObject to  this object
-
-    def execute(self, obj):
-        return
-
-    def __getstate__(self):
-        return self.Type
-
-    def __setstate__(self, state):
-        if state:
-            self.Type = state
+        super(_FemMeshResult, self).__init__(obj)