I'm trying to figure out how to have multiple 'pages' like B4xPages or B4A activities without using BANano Router. The "B4X Getting Started Guide has instructions for Router with a comment "I personally do not use this in my PWA's. B4J has already so much organization of your code build-in with its classes and modules that I do not really need it. I simply put the code in a normal B4J class per page and load them when needed. By emptying the <body> tag and loading the new layout, I have the same effect.". I'd like to have static modules or classes for each 'page' that has its own layout and logic. Can't see a way to associate a Class/Module to a Layout and 'run' it.