View holder Class in Android

This is a basic question. I was going through an official video by google regarding android. In it they used Viewholder class as

static class Viewholder{ ImageView image; Textview text; }

Would it be right to declare this class as static or view holder is used as static inner class.

I think suppose if its top level class th开发者_运维百科en compiler will throw error while using static keyword with top level class.

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Use static only if your ViewHolder is an inner class.