getValueWithArgs needs to be protected

h2/src/main/org/h2/expression/function/Function.java

@@ -1167,7 +1167,7 @@ public class Function extends Expression implements FunctionCall {
         return v;
     }
 
-    private Value getValueWithArgs(Session session, Expression[] args) {
+    protected Value getValueWithArgs(Session session, Expression[] args) {
         Value[] values = new Value[args.length];
         if (info.nullIfParameterIsNull) {
             for (int i = 0; i < args.length; i++) {