/**
 * Shared timepicker stepper logic.
 * Used by both Elements and React implementations.
 * Only framework-agnostic functions belong here.
 */
/**
 * Increments or decrements the time by one minute-step.
 * Rolls over: incrementing past 23:59 wraps to 00:00, and decrementing past 00:00 wraps to 23:59.
 * Falls back to sensible defaults when hours/minutes are empty strings.
 *
 * @param hours - Current hours display value ('09', '', etc.)
 * @param minutes - Current minutes display value ('30', '', etc.)
 * @param direction - 1 for next, -1 for previous
 * @param minuteStep - Step size in minutes
 * @returns Zero-padded { hours, minutes } strings
 */
export declare const stepTime: (hours: string, minutes: string, direction: 1 | -1, minuteStep: number) => {
    hours: string;
    minutes: string;
};