public override ExpressionElement Convert(IExpressionConverter converter, MethodCallExpression method)
 {
     var v = new VText();
     var overMethod = method;
     v.Add(overMethod.Method.Name.ToUpper() + "(");
     v.AddRange(1, overMethod.Arguments.Skip(1).
         Where(e => !(e is ConstantExpression)). //Skip null.
         Select(e => converter.Convert(e)).ToArray());
     return v.ConcatToBack(")");
 }