constructor(private documentList: DocumentListComponent, private logService: LogService ) {
     this.logService.log('ContentColumnListComponent is deprecated starting with 1.7.0 and may be removed in future versions. Use DataColumnListComponent instead.');
 }

 private handleError(error: any) {
     this.logService.error(error);
     return throwError(error || 'Server error');
 }

 map(() => {
     this.logService.info('delete');
 }),

 private onSearchUserError(): Observable<UserProcessModel[]> {
     this.logService.error('getWorkflowUsers threw error');
     return of([]);
 }

 onError(error: string) {
     this.logService.log(error);
 }

 (err: any) => {
     this.logService.error(err);
 });