import type { Span, WebFetchHeaders } from '@sentry/core';
/**
 * Extracts HTTP request headers as span attributes and optionally applies them to a span.
 */
export declare function addHeadersAsAttributes(headers: WebFetchHeaders | Headers | Record<string, string | string[] | undefined> | undefined, span?: Span): Record<string, string>;
//# sourceMappingURL=addHeadersAsAttributes.d.ts.map