Return set for depends

issue11134

purchase.py

@@ -54,7 +54,7 @@ class RequestQuotation(IncotermMixin, metaclass=PoolMeta):
 
     @classmethod
     def _incoterm_related_party(cls):
-        return Eval('supplier'), ['supplier']
+        return Eval('supplier'), {'supplier'}
 
 
 class RequestCreatePurchase(metaclass=PoolMeta):

sale.py

@@ -102,7 +102,7 @@ class Opportunity(IncotermMixin, metaclass=PoolMeta):
 
     @classmethod
     def _incoterm_readonly_state(cls):
-        return ~Eval('state').in_(['lead', 'opportunity']), ['state']
+        return ~Eval('state').in_(['lead', 'opportunity'])
 
     def _get_sale_opportunity(self):
         sale = super()._get_sale_opportunity()

stock.py

@@ -29,7 +29,7 @@ class ShipmentIn(ShipmentMixin, metaclass=PoolMeta):
 
     @classmethod
     def _incoterm_related_party(cls):
-        return Eval('supplier'), ['supplier']
+        return Eval('supplier'), {'supplier'}
 
 
 class ShipmentInReturn(ShipmentMixin, metaclass=PoolMeta):
@@ -37,7 +37,7 @@ class ShipmentInReturn(ShipmentMixin, metaclass=PoolMeta):
 
     @classmethod
     def _incoterm_related_party(cls):
-        return Eval('supplier'), ['supplier']
+        return Eval('supplier'), {'supplier'}
 
 
 class ShipmentOut(ShipmentMixin, metaclass=PoolMeta):
@@ -45,7 +45,7 @@ class ShipmentOut(ShipmentMixin, metaclass=PoolMeta):
 
     @classmethod
     def _incoterm_related_party(cls):
-        return Eval('customer'), ['customer']
+        return Eval('customer'), {'customer'}
 
 
 class ShipmentOutReturn(ShipmentMixin, metaclass=PoolMeta):
@@ -53,4 +53,4 @@ class ShipmentOutReturn(ShipmentMixin, metaclass=PoolMeta):
 
     @classmethod
     def _incoterm_related_party(cls):
-        return Eval('customer'), ['customer']
+        return Eval('customer'), {'customer'}