@@ -1134,7 +1134,7 @@ declare class Server<
11341134   */ 
11351135  static  findIp ( 
11361136    gatewayOrFamily : string , 
1137-     isInternal ?: boolean   |   undefined , 
1137+     isInternal ?: boolean , 
11381138  ) : string  |  undefined ; 
11391139  /** 
11401140   * @param  {"v4" | "v6" } family 
@@ -1377,32 +1377,27 @@ declare class Server<
13771377   * @param  {string | string[] } watchPath 
13781378   * @param  {WatchOptions } [watchOptions] 
13791379   */ 
1380-   watchFiles ( 
1381-     watchPath : string  |  string [ ] , 
1382-     watchOptions ?: import ( "chokidar" ) . WatchOptions  |  undefined , 
1383-   ) : void ; 
1380+   watchFiles ( watchPath : string  |  string [ ] ,  watchOptions ?: WatchOptions ) : void ; 
13841381  /** 
13851382   * @param  {import("webpack-dev-middleware").Callback } [callback] 
13861383   */ 
1387-   invalidate ( 
1388-     callback ?: import ( "webpack-dev-middleware" ) . Callback  |  undefined , 
1389-   ) : void ; 
1384+   invalidate ( callback ?: import ( "webpack-dev-middleware" ) . Callback ) : void ; 
13901385  /** 
13911386   * @returns  {Promise<void> } 
13921387   */ 
13931388  start ( ) : Promise < void > ; 
13941389  /** 
13951390   * @param  {(err?: Error) => void } [callback] 
13961391   */ 
1397-   startCallback ( callback ?: ( ( err ?: Error )  =>  void )   |   undefined ) : void ; 
1392+   startCallback ( callback ?: ( err ?: Error )  =>  void ) : void ; 
13981393  /** 
13991394   * @returns  {Promise<void> } 
14001395   */ 
14011396  stop ( ) : Promise < void > ; 
14021397  /** 
14031398   * @param  {(err?: Error) => void } [callback] 
14041399   */ 
1405-   stopCallback ( callback ?: ( ( err ?: Error )  =>  void )   |   undefined ) : void ; 
1400+   stopCallback ( callback ?: ( err ?: Error )  =>  void ) : void ; 
14061401} 
14071402declare  namespace  Server  { 
14081403  export  { 
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