/// <summary>
/// accessor: accessor_name '[' accessor_key ']';
/// </summary>
/// <param name="node"></param>
/// <param name="element"></param>
/// <returns></returns>
private INode Accessor(PegNode node, Element element)
{
var ident = node.GetAsString(Src);
var key = node.next_.GetAsString(Src).Replace("'", "");
var el = element.NearestAs<Element>(ident);
if (el!=null)
{
var prop = el.GetAs<Property>(key);
if (((INode)prop) != null) return prop.Value;
}
return new Anonymous("");
}