import { log } from "@lerna/core";
export interface FetchConfig {
    [key: string]: unknown;
    fetchRetries?: number;
    log: typeof log;
    registry?: string;
    username?: string;
}
/**
 * Create a merged options object suitable for npm-registry-fetch.
 */
export declare function getFetchConfig(options: Partial<FetchConfig>, extra: Partial<FetchConfig>): FetchConfig;