import { Readable } from 'stream';
export declare function getRealType(value: any): string;
export declare function executeCommand(command: string, args: string | string[], options?: {}): Promise<void>;
export declare function execInDir(dir: string, command: string): number;
export declare function assertNonNullable<T>(name: string, x: T): asserts x is NonNullable<T>;
export declare function checkNonNullable<T>(name: string, x: T): NonNullable<T>;
export declare function streamToArray<T>(stream: Readable): Promise<T[]>;
export declare function oldStreamToArray<T>(stream: NodeJS.ReadableStream): Promise<T[]>;
export declare function notEmpty<T>(value: T | null | undefined): value is T;
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