import { ValidatorFn } from '@angular/forms';
/**
 * Shared validator for 24-hour time format (HH:mm).
 * Validates both plain string values and autocomplete object values ({ id, name }).
 *
 * Valid examples: "00:00", "09:30", "23:59"
 * Invalid examples: "00:67", "24:00", "9:30", "abc", ""
 *
 * Hours must be 00–23, minutes must be 00–59.
 *
 * @export
 * @return {ValidatorFn} Angular validator function that returns { invalidTimeFormat: true } on failure
 */
export declare function timeFormatValidator(): ValidatorFn;