public BooksWorkspaceViewModel(IJsonRepository <BookRecord> bookRepository,
IJsonRepository <AuthorRecord> authorRepository,
IJsonRepository <GenreRecord> genreRepository)
{
bookRepository.NullGuard();
authorRepository.NullGuard();
genreRepository.NullGuard();
_bookRepository = bookRepository;
_authorRepository = authorRepository;
_genreRepository = genreRepository;
LoadedCommand = AsyncCommandBuilder.Create(LoadBooks);
}
