Variable env`Const`

env: {
    createBrowserEnv: () => Environment;
    createFileSystem: (fs?: any) => FileSystem;
    createNodejsEnv: () => Environment;
    getEnv: () => Environment;
    initialize: () => null | void;
    isBrowser: () => boolean;
    isNodejs: () => boolean;
    monkeyPatch: (env: Partial<Environment>) => void;
    setEnv: (env: Environment) => void;
} = ...