import { Span, Trace } from '../types';
export declare function groupSpans(spans: Map<string, Span>): Span[];
export declare function compareSpans(a: {
    start_timestamp: number;
}, b: {
    start_timestamp: number;
}): number;
export declare function getRootTransactionMethod(trace: Trace): string;
export declare function getRootTransactionName(trace: Trace): string;