/// <reference types="expo__bunyan" />
import Log from '@expo/bunyan';
import * as ExpoMetroConfig from '@expo/metro-config';
export declare type MetroDevServerOptions = ExpoMetroConfig.LoadOptions & {
    logger: Log;
};
export declare function runMetroDevServerAsync(projectRoot: string, options: MetroDevServerOptions): Promise<{
    server: any;
    middleware: any;
}>;