Fix code-style

cura/Settings/CuraContainerStack.py

@@ -244,8 +244,9 @@ class CuraContainerStack(ContainerStack):
     #
     #   \throws InvalidContainerStackError Raised when no definition can be found for the stack.
     @override(ContainerStack)
-    def deserialize(self, contents: str, file_name: Optional[str] = None) -> None:
-        super().deserialize(contents, file_name)
+    def deserialize(self, serialized: str, file_name: Optional[str] = None) -> str:
+        # update the serialized data first
+        serialized = super().deserialize(serialized, file_name)
 
         new_containers = self._containers.copy()
         while len(new_containers) < len(_ContainerIndexes.IndexTypeMap):
@@ -253,10 +254,11 @@ class CuraContainerStack(ContainerStack):
 
         # Validate and ensure the list of containers matches with what we expect
         for index, type_name in _ContainerIndexes.IndexTypeMap.items():
+            container = None
             try:
                 container = new_containers[index]
             except IndexError:
-                container = None
+                pass
 
             if type_name == "definition":
                 if not container or not isinstance(container, DefinitionContainer):
@@ -283,6 +285,9 @@ class CuraContainerStack(ContainerStack):
             from cura.Settings.CuraStackBuilder import CuraStackBuilder
             CuraStackBuilder.createDefinitionChangesContainer(self, self.getId() + "_settings")
 
+        ## TODO; Deserialize the containers.
+        return serialized
+
     ## protected:
 
     # Helper to make sure we emit a PyQt signal on container changes.