public ExpressionState(EvaluationContext context, SpelParserConfiguration configuration) {
   this(context, context.getRootObject(), configuration);
 }
 @Override
 public TypedValue getRootObject() {
   return delegate.getRootObject();
 }
 public ExpressionState(EvaluationContext context) {
   this(context, context.getRootObject(), new SpelParserConfiguration(false, false));
 }