C# (CSharp) Key.Accept примеры использования

Пример #1

        public override void AcceptChildren(WSqlFragmentVisitor visitor)
        {
            Key?.Accept(visitor);
            Value?.Accept(visitor);

            foreach (KeyValuePair <WValueExpression, WScalarExpression> kvp in MetaProperties)
            {
                kvp.Key.Accept(visitor);
                kvp.Value.Accept(visitor);
            }

            base.AcceptChildren(visitor);
        }