import { type ILogger } from '../logger/index.js';
export declare class ProgressTracker {
    readonly logger?: ILogger | undefined;
    private readonly _firstTimestamp;
    private _lastTimestamp;
    private _lastCompleted;
    private _completed;
    private _total;
    private _currentProgress;
    private readonly _deltas;
    private readonly _changed;
    constructor(logger?: ILogger | undefined);
    get changed(): import("./event.js").IEvent<{
        completed: number;
        total: number;
        currentProgress: number;
        totalElapsedMs: number;
        totalEstimatedMs: number;
    }>;
    get total(): number;
    get completed(): number;
    get current(): number;
    setTotal(total: number): this;
    add(amount?: number, restart?: boolean): void;
    track(completed: number, total: number): void;
}