/// <summary>
 /// 新しいインスタンスを初期化します。
 /// </summary>
 /// <param name="databaseAccessor"></param>
 /// <param name="movselexGroup"></param>
 public MovselexLibrary(IMovselexDatabaseAccessor databaseAccessor, MovselexGroup movselexGroup)
 {
     _databaseAccessor = databaseAccessor;
     _movselexGroup = movselexGroup;
     LibraryItems = new ObservableCollection<LibraryItem>();
 }
 public MovselexPlaying(IMovselexDatabaseAccessor databaseAccessor)
 {
     _databaseAccessor = databaseAccessor;
     PlayingItems = new ObservableCollectionEx<PlayingItem>();
 }
 public MovselexGroup(IMovselexDatabaseAccessor databaseAccessor)
 {
     _databaseAccessor = databaseAccessor;
     GroupItems = new SelectableObservableCollection<GroupItem>();
 }