public KeypadViewModel(ApplicationManager appManager,
     CallViewModel callViewModel,
     CallsManager callsManager)
 {
     _appManager = appManager;
     _callViewModel = callViewModel;
     _callsManager = callsManager;
 }
 public MainViewModel(ApplicationManager appManager,
     CallViewModel callViewModel,
     AccountManager accountManager)
 {
     _appManager = appManager;
     _callViewModel = callViewModel;
     _accountManager = accountManager;
 }
 public VoipTranslatorNavigator(NavigationBuilder navigationBuilder, 
     ApplicationManager appManager,
     AccountManager accountManager) 
     : base(navigationBuilder)
 {
     _appManager = appManager;
     _accountManager = accountManager;
     _appManager.RegistrationRequested += _appManager_OnRegistrationRequested;
 }