import type { LoadBundleTaskProgress } from './types/firestore';
export declare class LoadBundleTask implements PromiseLike<LoadBundleTaskProgress> {
    private _progressObserver;
    private _completionPromise;
    private _resolve?;
    private _reject?;
    private _lastProgress;
    constructor();
    onProgress(next?: (progress: LoadBundleTaskProgress) => unknown, error?: (err: Error) => unknown, complete?: () => void): void;
    catch<R>(onRejected: (a: Error) => R | PromiseLike<R>): Promise<R | LoadBundleTaskProgress>;
    then<T, R>(onFulfilled?: (a: LoadBundleTaskProgress) => T | PromiseLike<T>, onRejected?: (a: Error) => R | PromiseLike<R>): Promise<T | R>;
    _completeWith(progress: LoadBundleTaskProgress): void;
    _failWith(error: Error): void;
    _updateProgress(progress: LoadBundleTaskProgress): void;
}
//# sourceMappingURL=LoadBundleTask.d.ts.map