question: public static List < PrincipalUserDto > transformToDto ( List < PrincipalUser > users ) { if ( users == null ) { throw new WebApplicationException ( "Null entity object cannot be converted to Dto object." , Status . INTERNAL_SERVER_ERROR ) ; } List < PrincipalUserDto > result = new ArrayList < > ( ) ; for ( PrincipalUser user : users ) { result . add ( transformToDto ( user ) ) ; } return result ; }
target:  Converts list of alert entity objects to list of alertDto objects.