Take some time to explore the demos above and look at the extension source code to get an appreciation for how complex an ext JS extension or plug-in can be.
花一点时间来研究以上演示、看看扩展源代码，获取对扩展和插件的复杂程度的一个正确了解。
I have been a part of Ext JS projects in the past where I wished for this feature, but didn't have enough time to do it myself.
我曾在一个ExtJS项目中想要实现这个特性，但没有足够时间自己实现。
I have been a part of Ext JS projects in the past where I wished for this feature, but didn't have enough time to do it myself.
我曾在一个ExtJS项目中想要实现这个特性，但没有足够时间自己实现。
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