import { MatchPCREResult } from '../pcre';
/**
 * Applies a set of headers to a response.
 *
 * If the header key is `set-cookie`, the value will be appended. Otherwise, the value will be set
 * and overridden to prevent duplicates which sometimes happens with headers like `x-matched-path`.
 *
 * @param target Headers object to apply to.
 * @param source Headers to apply.
 * @param pcreMatch PCRE match result to apply to header values.
 */
export declare const applyHeaders: (target: Headers, source: Record<string, string> | Headers, pcreMatch?: MatchPCREResult) => void;
//# sourceMappingURL=apply-headers.d.ts.map