Initial import from Docker volume

modules/account_dunning_fee/account.py

@@ -0,0 +1,12 @@
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+from trytond.pool import PoolMeta
+
+
+class Move(metaclass=PoolMeta):
+    __name__ = 'account.move'
+
+    @classmethod
+    def _get_origin(cls):
+        return super(Move, cls)._get_origin() + [
+            'account.dunning.fee.dunning_level']