import type { Tree } from '@nx/devkit';
import type { NestGeneratorWithLanguageOption, NormalizedOptions, UnitTestRunner } from './types';
export declare function normalizeOptions(tree: Tree, options: NestGeneratorWithLanguageOption, normalizationOptions?: {
    allowedFileExtensions?: Array<'js' | 'ts'>;
    skipLanguageOption?: boolean;
    suffix?: string;
}): Promise<NormalizedOptions>;
export declare function unitTestRunnerToSpec(unitTestRunner: UnitTestRunner | undefined): boolean | undefined;