This library is for the core of draw.
The intend is to provide required reusable code that are needed by more than component/bundle.
Some component/bundle use annotations of other libraries that are not in the required section of composer.
If those annotations are parse by doctrine annotation reader it will throw a error if they are not ignored.
Instead of ignoring them yourself those yourself the core component will automatically detect draw namespaced annotations that are not present (via a configuration) and register them as ignore if doctrine annotation reader is present.
If you want to use it in your project check ignore_annotations.php for a example.