There are new rules about "reachability" and "module linkage". Not to mention things like methods defined within the class declaration are no longer as-if `inli

There are new rules about "reachability" and "module linkage". Not to mention things like methods defined within the class declaration are no longer as-if `inline` when within a module. It's not just "a faster preprocessor" mode; there are real rules associated with module boundaries.