Not only does ButtonWithCallbacks handle behaviors essential to buttons (like clicking), it also handles notification of click events by invoking the callback functions.
ButtonWithCallbacks不仅处理按钮的一些本质行为(比如单击)，它同时还通过调用回调函数处理单击事件的通知。
This overload receives notification, through a callback, of the identity of the event handler for the operation.
此重载通过回调接收操作的事件处理程序标识的通知。
Sets notification that wait notification is required and prepares the callback method so it can be called more reliably when a wait occurs.
设置指示需要等待通知的通知，并准备回调方法以使其在发生等待时可以更可靠地被调用。
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