/**
 * Return the end of the quarter for a given UTC Instant string.
 *
 * - Calculates quarter end month: Q1=3, Q2=6, Q3=9, Q4=12.
 * - Returns last moment of the quarter.
 * - Returns "" for invalid input.
 *
 * @param value UTC Instant string
 * @returns UTC Instant string for the end of the quarter, or "" on invalid input
 *
 * @example endOfQuarterForUtc("2024-03-15T12:00:00Z") // "2024-03-31T23:59:59.999Z"
 * @example endOfQuarterForUtc("invalid") // ""
 */
export declare function endOfQuarterForUtc(value: string): string;