/**
 * Returns the next active item ID from the current state.
 *
 * We allow circular keyboard navigation from the base index.
 * The base index can either be `null` (nothing is highlighted) or `0`
 * (the first item is highlighted).
 * The base index is allowed to get assigned `null` only if
 * `props.defaultActiveItemId` is `null`. This pattern allows to "stop"
 * by the actual query before navigating to other suggestions as seen on
 * Google or Amazon.
 *
 * @param moveAmount The offset to increment (or decrement) the last index
 * @param baseIndex The current index to compute the next index from
 * @param itemCount The number of items
 * @param defaultActiveItemId The default active index to fallback to
 */
export declare function getNextActiveItemId(moveAmount: number, baseIndex: number | null, itemCount: number, defaultActiveItemId: number | null): number | null;