import type { SpanBase } from '../spanTypes';
export interface TimelineOptions {
    scale?: number;
    width?: number;
    startTime?: number;
    gapThreshold?: number;
}
type SpanLike = Pick<SpanBase<any>, 'startTime' | 'duration' | 'name' | 'type'>;
interface PerformanceEntryLike {
    duration: number;
    entryType: string;
    name: string;
    startTime: number;
}
export declare function generateAsciiTimeline(spans: (PerformanceEntryLike | SpanLike)[], options?: TimelineOptions): string;
export {};