export declare class AbortError extends Error {
    code: string;
    constructor(message: string);
}
interface Block {
    offset: number;
    length: number;
}
export declare function groupBlocks(blocks: Block[]): {
    blocks: Block[];
    length: number;
    offset: number;
}[];
/**
 * Properly check if the given AbortSignal is aborted. Per the standard, if the
 * signal reads as aborted, this function throws either a DOMException
 * AbortError, or a regular error with a `code` attribute set to `ERR_ABORTED`.
 *
 * For convenience, passing `undefined` is a no-op
 *
 * @param {AbortSignal} [signal] an AbortSignal, or anything with an `aborted` attribute
 * @returns nothing
 */
export declare function checkAbortSignal(signal?: AbortSignal): void;
/**
 * Skips to the next tick, then runs `checkAbortSignal`.
 * Await this to inside an otherwise synchronous loop to
 * provide a place to break when an abort signal is received.
 * @param {AbortSignal} signal
 */
export declare function abortBreakPoint(signal?: AbortSignal): Promise<void>;
export {};