/**
 * Convert an arbitrary abort reason into the framework's stable Error shape.
 *
 * A cancellation reason is one of the few values that routinely crosses a realm
 * on its way here — it is minted by whoever called `abort()`, which can be a
 * worker, a host runtime, or another instance of this module graph. Testing it
 * with `instanceof` would drop those reasons on the floor and replace the real
 * cause of a cancellation with a generic message, so the brand check is used
 * instead. Reasons that are not errors at all (a string, `undefined`, a plain
 * object) still become the framework's AbortError, as before.
 */
export declare function createAbortError(reason?: unknown): Error;
/** Throw the normalized abort reason when a signal has already been aborted. */
export declare function throwIfAborted(abortSignal?: AbortSignal): void;
/**
 * Await a value while allowing cancellation to win even when the producer
 * ignores its signal.
 */
export declare function awaitAbortable<T>(value: T | PromiseLike<T>, abortSignal?: AbortSignal): Promise<T>;
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