displayedColumns: string[] = ['nbId', 'nodeType', 'ranName', 'ranIp', 'ranPort', 'connectionStatus'];
dataSource: RANControlDataSource;
private instanceChange: Subscription;
displayedColumns: string[] = ['nbId', 'nodeType', 'ranName', 'ranIp', 'ranPort', 'connectionStatus'];
dataSource: RANControlDataSource;
private instanceChange: Subscription;