In Dart there’s a possibility to write a documentation (doc) comment on the library. This will help the users of the library to get some general
understanding what is the purpose of the library. The comment might contain some examples, library specific terminology, or anything else that you
think might be relevant.
Such comments might accidentally become dangling if placed in the beginning of the file but without the library directive. It is
important to make sure that comments are placed right before the library directive.
