public final Application launchApp(String appId) throws IOException {
        Status status = channel().launch(appId);
        return status == null ? null : status.getRunningApp();
    }
public final Application launchApp ( String appId ) throws IOException { Status status = channel ( ) . launch ( appId ) ; return status == null ? null : status . getRunningApp ( ) ; }
@param appId    application identifier
@return application descriptor if app successfully launched, null otherwise
@throws IOException