public SearchViewModel(SubredditsViewModel subredditsVM, INavigationService nav, bool isInDesignMode)
 {
     navigationService = nav;
     if (isInDesignMode)
     {
         InitDesignTime();
     }
     else
     {
         Init(subredditsVM);
     }
 }
 private void Init(SubredditsViewModel subredditsVM)
 {
     this.subredditsVM = subredditsVM;
     IsReddit          = true;
 }