/**
 * Returns the first descendant of the container that the browser reaches when
 * pressing `Tab`, or `null` if there is none. Unlike `getFirstFocusableChild`
 * this skips elements that are not rendered or that are inside an `inert`
 * subtree.
 *
 * @internal
 */
export declare function getFirstTabbableChild(container: HTMLElement | Node): Node | null;
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