@SuppressWarnings("deprecation")
 public boolean isExplicitTransformation(
     String sourceMimetype, String targetMimetype, TransformationOptions options) {
   boolean result = true;
   for (ContentTransformer ct : this.transformers) {
     if (ct.isExplicitTransformation(sourceMimetype, targetMimetype, options) == false) {
       result = false;
     }
   }
   return result;
 }