shopfloor: add hook before assign after change lot

shopfloor/actions/change_package_lot.py

@@ -161,6 +161,9 @@ def is_lesser(value, other, rounding):
         # lines
         move_line.move_id._action_assign()
 
+        self._change_pack_lot_change_lot__before_assign(
+            previous_lot, lot, to_assign_moves
+        )
         # Find other available goods for the lines which were using the
         # lot before...
         to_assign_moves._action_assign()
@@ -170,6 +173,11 @@ def is_lesser(value, other, rounding):
             message["body"] = "{} {}".format(message["body"], " ".join(message_parts))
         return response_ok_func(move_line, message=message)
 
+    def _change_pack_lot_change_lot__before_assign(
+        self, previous_lot, lot, to_assign_moves
+    ):
+        pass
+
     def _package_content_replacement_allowed(self, package, move_line):
         # we can't replace by a package which doesn't contain the product...
         return move_line.product_id in package.quant_ids.product_id