import { Observable } from 'rxjs';
import { Reader } from '../../reader';
import { BoundaryReachedEvent } from './boundary';
export type BookBoundaryReachedOptions = {
    itemReadinessTimeoutMs?: number;
};
export type BookBoundaryReachedEvent = BoundaryReachedEvent;
export declare const observeBookBoundaryReached: (reader: Reader, { itemReadinessTimeoutMs, }?: BookBoundaryReachedOptions) => Observable<BookBoundaryReachedEvent>;