package Ġcom . b sel zer . gw 2 . v 2 . model . enumeration . extension . mast ery Ċ Ċ import Ġcom . b sel zer . gw 2 . v 2 . model . enumeration . cont inent . Region Name Ċ import Ġcom . b sel zer . gw 2 . v 2 . model . mast ery . M ast ery Ċ import Ġcom . b sel zer . k tx . serialization . function . enum Value OrNull Ċ Ċ /** Ċ Ġ* ĠThe Ġ[ M ast ery . region ] Ġas Ġa Ġ[ Region Name ] Ċ Ġ*/ Ċ fun ĠM ast ery . region (): ĠRegion Name ? Ġ= Ġregion . enum Value OrNull < Region Name >()