code: public Set<Constructor> getConstructorsAnnotatedWith(final Class<? extends Annotation> annotation) {
          Iterable<String> methods = store.get(index(MethodAnnotationsScanner.class), annotation.getName());
          return getConstructorsFromDescriptors(methods, loaders());
      }
docs: get all constructors annotated with a given annotation
  <p/>depends on MethodAnnotationsScanner configured