type DropdownState<Item> = {
    isOpen: boolean;
    inputValue: string;
    highlightedIndex: number;
    selectedItem: Item | null;
};
/**
 * Check if a state is equal for dropdowns, by comparing isOpen, inputValue, highlightedIndex and selected item.
 * Used by useSelect and useCombobox.
 *
 * @param prevState The previous dropdown state.
 * @param newState The new dropdown state.
 * @returns Whether the states are deeply equal.
 */
export declare function isDropdownStateEqual<Item>(prevState: DropdownState<Item>, newState: DropdownState<Item>): boolean;
export {};