import type { RenovateConfig } from '../../../../config/types';
import type { MigratedData } from './migrated-data';
export declare function rebaseMigrationBranch(config: RenovateConfig, migratedConfigData: MigratedData): Promise<string | null>;
/**
 * @param json a JSON string
 * @return a minimal json string. i.e. does not contain any formatting/whitespaces
 */
export declare function jsonStripWhitespaces(json: string | null): string | null;