@Query("select * from book_sources where enabledExplore = 1 and exploreUrl is not null and exploreUrl <> '' order by customOrder asc")
funliveExplore():LiveData<List<BookSource>>
@Query("select bookSourceGroup from book_sources")
@Query("select bookSourceGroup from book_sources where bookSourceGroup is not null and bookSourceGroup <> ''")
funliveGroup():LiveData<List<String>>
@Query("select distinct enabled from book_sources where bookSourceName like :searchKey or `bookSourceGroup` like :searchKey or bookSourceUrl like :searchKey")