[Zope] ZClass in ZClass problem

Hello! (Nobody dared to answer, retrying...) I started to learn ZClasses. I created a product, added a Zclass in it, and added a Zcalss inside outer ZClass - I want to create ZClass that's addable only inside outer ZClass. Then the problems begin. All management URLs for inner ZClass

[Zope] ZClass in ZClass problem

Hello! I started to learn ZClasses. I created a product, added a Zclass in it, and added a Zcalss inside outer ZClass - I want to create ZClass that's addable only inside outer ZClass. Then the problems begin. All management URLs for inner ZClass contain %20, so URLs look like