/**
 * @fileoverview Abort signal utilities.
 */
/**
 * Create a composite AbortSignal from multiple signals.
 */
export declare function createCompositeAbortSignal(...signals: Array<AbortSignal | null | undefined>): AbortSignal;
/**
 * Create an AbortSignal that triggers after a timeout.
 */
export declare function createTimeoutSignal(ms: number): AbortSignal;
