@Query("select bookSourceGroup from book_sources where bookSourceGroup is not null and bookSourceGroup <> ''")
funliveGroup():LiveData<List<String>>
@Query("select bookSourceGroup from book_sources where enabled = 1 and bookSourceGroup is not null and bookSourceGroup <> ''")
funliveGroupEnabled():LiveData<List<String>>
@Query("select distinct enabled from book_sources where bookSourceName like :searchKey or bookSourceGroup like :searchKey or bookSourceUrl like :searchKey")