@Override
 public Object get(Object key) {
   return delegate.get(key);
 }
 /**
  * Discouraged; returns the String so if it is external config, it will be the {@code
  * $brooklyn:external(...)} format.
  */
 @Override
 @SuppressWarnings("rawtypes")
 @Deprecated
 public String get(Map flags, String key) {
   return delegate.get(flags, key);
 }