import { Step } from './Step';
export interface TimelineConfig {
    loop?: boolean;
}
export declare class Timeline {
    private _steps;
    private _lastStepTime;
    private _lastStep;
    private _loop;
    constructor(steps: Step[], config?: TimelineConfig);
    get loop(): boolean;
    get totalDuration(): number;
    get lastStep(): Step | null;
    set lastStep(lastStep: Step | null);
    get lastStepTime(): number;
    set lastStepTime(lastStepTime: number);
    getCurrentStep(time: number): Step;
    getDurationUntilStep(step: Step): number;
    addStep(step: Step, index?: number): void;
    removeStep(step: Step): void;
    getDuration(): number;
}