ENUM
enum Countries_summarySortByInput {CONFIRMED_DAILY_ASCCOUNTRY_ASCDEATHS_ASCDEATHS_DESCDEATHS_DAILY_ASCDEATHS_DAILY_DESCPOPULATION_ASC_ID_DESCRECOVERED_DAILY_DESCCONFIRMED_DAILY_DESCPOPULATION_DESCRECOVERED_ASCRECOVERED_DAILY_ASCCONFIRMED_DESCCOUNTRY_DESCDATE_ASCDATE_DESCRECOVERED_DESC_ID_ASCCONFIRMED_ASC}