peek
fun peek(player: Player, layout: String, element: String, source: HeadTarget, variables: Map<String, String>, context: String = "default"): HeadTargetValues.Value(source)
同步返回缓存/加载状态；必要的脚本执行与结果归一化回到主线程。 / Returns immediately; script execution and normalization run on the server thread.