如何写一个无状态的窗？
我刚刚开始学习颤音，我遇到了一个问题，现在试图解决三天。 希望有人可以帮助我。
问题是，当我尝试编写一个无状态的小部件时，它应该显示出捷径，然后单击Enter，以便自动填写所有代码，但是当我按Enter Enter Enter不完成代码时，它仅显示仅显示的代码我写过的“无国籍”的单词以及当然显示出红色纸浆的错误。
I had just started learning flutter and I face a problem that now trying to solve it for three days.
Hope someone can help me.
The problem is that when I am trying to write a stateless widget, it should appear a short cut for it and click enter so it will automatic fill in all the code, but when I press enter it doesn't complete the code it only shows the word that I had written 'StatelessWidget' and of course it shows error with the red pulp.
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