import type { LylaRequestHeaders } from './types';
export declare function mergeUrl(baseUrl: string, relativeUrl: string): string;
export declare function mergeHeaders(target: Record<string, string>, source: LylaRequestHeaders | undefined): Record<string, string>;
export declare function mergeOptions<T>(...sources: Array<Partial<T> | undefined>): T;
export declare function headersKeyToLowerCase(_headers: Record<string, string> | null | undefined): Record<string, string>;
//# sourceMappingURL=utils.d.ts.map