DeliveryLine: let a type based method decide if this delivery line is moving item

product/ERP5/Document/DeliveryLine.py

@@ -109,6 +109,9 @@ class DeliveryLine(Movement, XMLMatrix, ImmobilisationMovement):
     security.declareProtected(Permissions.AccessContentsInformation,
                              'isMovingItem')
     def isMovingItem(self, item):
+      type_based_script = self._getTypeBasedMethod('isMovingItem')
+      if type_based_script:
+        return type_based_script(item)
       return self.isAccountable()
 
     def _getTotalPrice(self, default=0.0, context=None, fast=0):