code: public static Optional<AnnotationMirror> findAnnotationMirror(
        Element element, QualifiedName annotationClass) {
      return findAnnotationMirror(element, Shading.unshadedName(annotationClass.toString()));
    }
docs: Returns an {@link AnnotationMirror} for the annotation of type {@code annotationClass} on
  {@code element}, or {@link Optional#empty()} if no such annotation exists.