Virtual AST Node Properties

When generating the AST node classes from the language designer, is it possible to generate the node properties as virtual?

For example:

    public partial class Expression : AstNodeBase {
        
        private DataType computedTypeValue;
        
        public override Int32 Id {
            get {
                return FormulaAstNodeId.Expression;
            }
        }

        public DataType ComputedType {
            get {
                return this.computedTypeValue;
            }
            set {
                this.computedTypeValue = value;
            }
        }
    }

 Becomes

    public partial class Expression : AstNodeBase {
        
        private DataType computedTypeValue;
        
        public override Int32 Id {
            get {
                return FormulaAstNodeId.Expression;
            }
        }

        public virtual DataType ComputedType {
            get {
                return this.computedTypeValue;
            }
            set {
                this.computedTypeValue = value;
            }
        }
    }