@ -13,7 +13,7 @@ interface BookDao {
@Query("SELECT * FROM books WHERE `group` = :group")
fun observeByGroup(group: Int): DataSource.Factory<Int, Book>
@Query("SELECT url FROM books WHERE `group` = :group")
@Query("SELECT descUrl FROM books WHERE `group` = :group")
fun observeUrlsByGroup(group: Int): LiveData<List<String>>
}