asyncLocalStorage.getStore()
返回当前存储。如果在通过调用 asyncLocalStorage.run() 或 asyncLocalStorage.enterWith() 初始化的异步上下文之外调用，它将返回 undefined。
¥Returns the current store.
If called outside of an asynchronous context initialized by
calling asyncLocalStorage.run() or asyncLocalStorage.enterWith(), it
returns undefined.