package Ġapp . ub ie . kot ling raph ql sample . service Ċ Ċ import Ġapp . ub ie . kot ling raph ql sample . domain . Dr ug Ċ import Ġapp . ub ie . kot ling raph ql sample . domain . Dr ug Repository Ċ import Ġorg . springframework . stereotype . Service Ċ Ċ @ Service Ċ class ĠDr ug Service ( private Ġval Ġrepository : ĠDr ug Repository ) Ġ{ ĊĠĠĠ Ġfun Ġget Dr ug s ( yj Code : ĠString ): ĠList < Dr ug > Ġ= Ġrepository . get Dr ug s ( yj Code ) ĊĠĠĠ Ġfun Ġget Dr ug s ( yj Codes : ĠList < String >): ĠList < Dr ug > Ġ= Ġrepository . get Dr ug s ( yj Codes ) ĊĠĠĠ Ġfun Ġget Dr ug ( id : ĠString ): ĠDr ug ? Ġ= Ġrepository . get Dr ug ( id ) Ċ }