Update WritingAColladaFactoryWithPython.md

Author: Roberto De Ioris

tutorials/WritingAColladaFactoryWithPython.md

@@ -392,6 +392,31 @@ Remember to change the FixMeshData function to honour the self.force_rotation va
 
 ## Persistent importer options: more subclassing
 
+All should work fine, but it would be way cooler if the option we set in the importer wizard are remembered between imports.
+
+We could obviously create a python class for storing values and mapping an instance of it to the ColladaFactory, but there is a better approach that will allow us to generate slate widgets automatically (without describing every single part of the interface).
+
+Remember that you can inherit from every UClass, even UObject !
+
+```python
+from unreal_engine.classes import Material, Object
+from unreal_engine.struct import Rotator
+
+class ColladaImportOptions(Object):
+
+    DefaultRotation = Rotator
+    DefaultMaterial = Material
+    
+...
+
+class ColladaFactory(PyFactory):
+
+    ImportOptions = ColladaImportOptions()
+    
+    ...
+
+```
+
 ## Automatically add the ColladaFactory on editor startup
 
 ## Improvements and final notes