Inheritance: TabItemViewModel
 public NicoRepoListViewModel(NicoRepoViewModel vm, string title, string id)
     : base(title)
 {
     NicoRepoVM = vm;
     Id = id;
     Result = new NicoRepoResultViewModel(title);
 }
 public NicoRepoListViewModel(NicoRepoViewModel vm, string title, string id) : base(title)
 {
     NicoRepoVM = vm;
     Id         = id;
     Result     = new NicoRepoResultViewModel(title);
 }