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本页 3 段还没译成Deutsch，下面显示的是英文原文。focusManager
还没翻译译自英文（tanstack.com）本页 3 段都还没译
const focusManager: FocusManager;Defined in: packages/query-core/src/focusManager.ts:144
Singleton instance of FocusManager, used to manage and observe the focus state within TanStack Query.
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