import type { Span } from 'effect/Tracer';
import type { PrettyPrintOptions } from './../../../types/index.js';
type MaybePrintSpansTimelineOutput = {
    spanAttributesStack: string[] | undefined;
    spansTimeline: string[];
};
export declare const maybePrintSpansTimeline: (span: Span | undefined, isPlainString: boolean, options: PrettyPrintOptions) => MaybePrintSpansTimelineOutput;
export {};