Hi guys I was reading the definitions we sent around and I have some questions about => Object subclass: #TestLocal slots: { #local => ProcessLocalSlot } classVariables: { } category: 'SlotTestGuille'. Object subclass: #TestLocal2 slots: { #local => ProcessLocalSlot default: 5} classVariables: { } category: 'SlotTestGuille'. Are we sure that we want to use that => I thought about = but this is not an assignement this is a declaration and normally we use | for declaration. So what would be other alternatives before the world use => Then I still do not understand why we have empty classVariables: to me it does not make sense. I do not get why we like to have empty collections for the sake of having empty collections. We are trapped in some strange ways of thinking. Object subclass: #TestLocal slots: { #local => ProcessLocalSlot } classVariables: { } category: 'SlotTestGuille'. => Object subclass: #TestLocal slots: { #local => ProcessLocalSlot } package: 'SlotTestGuille'.