public static void SpliceInsert(this WList<LNode> list, int index, LNode node, Symbol listName = null)
{
if (node.Calls(listName ?? CodeSymbols.Splice))
list.InsertRange(index, node.Args);
else
list.Insert(index, node);
}
public static void SpliceAdd(this WList<LNode> list, LNode node, Symbol listName = null)