/**
 * Wires up a keydown listener that dispatches to strategy[evt.key] or strategy.default.
 * Handles both sync and async handlers.
 * @param {HTMLElement} component - The component to attach the listener to.
 * @param {Object} strategy - Map of key names to handler functions.
 */
export function applyKeyboardStrategy(component: HTMLElement, strategy: any): void;
/**
 * Shared arrow navigation. Calls menu.navigateOptions(direction) if visible.
 * Optionally opens dropdown via showFn when closed.
 * @param {HTMLElement} component - The component with dropdown and menu references.
 * @param {string} direction - 'up' or 'down'.
 * @param {Object} [options] - Optional config.
 * @param {Function} [options.showFn] - Called to open the dropdown when closed.
 */
export function navigateArrow(component: HTMLElement, direction: string, options?: {
    showFn?: Function;
}): void;