/**
  * Helper method to return an image with error overlay.
  *
  * @param baseKey - key of the base image. Expected to be in repository.
  * @return an image with error overlay.
  */
 public static Image getImageWithError(String baseKey) {
   return VersionTreeImages.getImageOverlaid(
       baseKey, VersionTreeImages.IMG_OVR_ERROR, IDecoration.BOTTOM_LEFT);
 }
 /**
  * Helper method to return an image with warning overlay.
  *
  * @param baseKey - key of the base image. Expected to be in repository.
  * @return an image with warning overlay.
  */
 public static Image getImageWithWarning(String baseKey) {
   return VersionTreeImages.getImageOverlaid(
       baseKey, VersionTreeImages.IMG_OVR_WARNING, IDecoration.BOTTOM_LEFT);
 }