/**
 * Subscribe to `keyboardDidShow` / `keyboardDidHide` and invoke a
 * caller-supplied `onChange` whenever either fires. Tracks the current
 * keyboard height so consumers can use it directly in layout math.
 *
 * Both Dropdown and MultiSelect re-measured the trigger every time the
 * keyboard moved; callers pass their `_measure` function in as
 * `onChange`.
 *
 * @param onChange Fired on every show / hide with the new keyboard
 *   height (0 on hide). Kept as a reference — consumers should wrap
 *   their handler in `useCallback` so the listeners aren't re-registered
 *   on every render.
 * @returns the current keyboard height in dp.
 */
export declare function useKeyboardTracking(onChange?: (height: number) => void): number;
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