/**
  * {@inheritDoc}
  *
  * @see
  *     org.eclipse.emf.ecore.resource.impl.ExtensibleURIConverterImpl#delete(org.eclipse.emf.common.util.URI,
  *     java.util.Map)
  */
 @Override
 public void delete(URI uri, Map<?, ?> options) throws IOException {
   if (parent != null) {
     parent.delete(uri, options);
   }
   super.delete(uri, options);
 }