export interface Step {
    name?: string;
    onFailure?: OnFailure;
}
export interface OnFailure {
    reason: string;
}
export declare class SingleProcessingMilestone {
    protected pipelineName?: string;
    protected logger?: (msg: string) => void;
    protected _steps: Step[];
    protected _isFinished: boolean;
    constructor(pipelineName?: string, logger?: (msg: string) => void);
    protected throwIfEnded(): void;
    get totalSteps(): number;
    addStep(name?: string, onFailure?: OnFailure): void;
    result(): Step;
}