Apple didn't really ever see a need for dependency management control and stuff like that in Objective C day because everything was so loosey, goosy with message dispatch. Observation tracking does open up new possibilities, new powers we could possibly give a dependency library or anyone can add to the library. The idea of the observation in general, I think will be really,. it's just going to allow us to build some very interesting tools. But the idea of controlling dependencies, observation alone doesn't really change that story. Right? How as far as using macros? Macros just will make, finally controlling your Dependency Management more ergonomic, maybe not to do it or not toDo it