/**
 * Return true if two PlainTime ISO strings represent the same time components.
 *
 * - Compares all time components: hour, minute, second, millisecond, microsecond, nanosecond.
 * - Returns false if either input is invalid.
 *
 * @param value1 first ISO PlainTime string
 * @param value2 second ISO PlainTime string
 * @returns boolean indicating whether both times are equal component-wise
 *
 * @example areTimesEqual("12:34:56", "12:34:56") // true
 * @example areTimesEqual("12:34:56", "12:34:57") // false
 * @example areTimesEqual("12:34:56.789", "12:34:56.789") // true
 * @example areTimesEqual("12:34:56.789", "12:34:56.790") // false
 * @example areTimesEqual("invalid", "12:34:56") // false
 * @example areTimesEqual("12:34:56", "invalid") // false
 */
export declare function areTimesEqual(value1: string, value2: string): boolean;