public MainViewModel(
GroupsListViewModel groupsListViewModel,
CallsListViewModel callsListViewModel,
CallControlViewModel callControlViewModel)
{
GroupsListViewModel = groupsListViewModel;
CallsListViewModel = callsListViewModel;
CallControlViewModel = callControlViewModel;
}
public GroupUpdateHandler(GroupsListViewModel groupsListViewModel)
{
this.groupsListViewModel = groupsListViewModel;
}