/**
* @file NS History Of Operations Component
*/
-import { isNullOrUndefined } from 'util';
import { Component, Injector, OnInit } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
import { Router } from '@angular/router';
import { NSDInstanceData } from 'NSInstanceModel';
import { RestService } from 'RestService';
import { Subscription } from 'rxjs';
-import { SharedService } from 'SharedService';
+import { SharedService, isNullOrUndefined } from 'SharedService';
import { ShowInfoComponent } from 'ShowInfoComponent';
/**