import { Progress } from '../core/progress';
import { BatchAsset, AssetRecord } from '../types';
export declare abstract class Fetcher {
    protected _total: number;
    protected _loaded: number;
    protected _failed: number;
    protected _batchAssets: BatchAsset[];
    protected _onLoad: (assetRecord: AssetRecord, progress: Progress) => void;
    protected _onComplete: (progress: Progress) => void;
    protected _onError: (url: string, error: Error) => void;
    constructor(batchAssets: BatchAsset[], onLoad: (assetRecord: AssetRecord, progress: Progress) => void, onComplete: (progress: Progress) => void, onError: (url: string, error: Error) => void);
    abstract fetch(): void;
    protected loadAsset(batchAsset: BatchAsset, onSuccess: (assetRecord: AssetRecord) => void, onError: (url: string, error: Error) => void): void;
    protected progress(): Progress;
    private loader;
}