import { ExportResult } from '@opentelemetry/core';
import * as zipkinTypes from '../../types';
/**
 * Prepares send function that will send spans to the remote Zipkin service.
 */
export declare function prepareSend(urlStr: string, headers?: Record<string, string>): (zipkinSpans: zipkinTypes.Span[], done: (result: ExportResult) => void) => void;