Foundation is in general a dependency-free base layer for Java projects. Foundation has four layers: pure, shared, jvm and client. ⚪️Pure: No dependencies, only classes from the j2cl compatible fragment. Java 11+ (maybe up to 21) syntax. Exception: Jjspecify annotations are allowed. ⚪️Shared: Only j2cl-dependencies allowed (e.g. elements). Java 11+ (maybe up to 21) syntax. ⚪️Client: This code runs only j2cl-compiled in the client. It may have dependencies ...