findById doesn't work for SubstationRepository and LineRepository

[jonenst]

• Do you want to request a feature or report a bug?
  bug

public interface SubstationRepository extends CassandraRepository<SubstationEntity, String> {

public class SubstationEntity {

    @PrimaryKeyColumn(ordinal = 0, type = PrimaryKeyType.PARTITIONED)
    private String country;

    @PrimaryKeyColumn(ordinal = 1, type = PrimaryKeyType.CLUSTERED)
    private String id;

The second type parameter (ID) is wrong in the SubstationRepository and LineRepository

• What is the current behavior?
  findById doesn't work for SubstationRepository and LineRepository

• What is the expected behavior?
  should work

• What is the motivation / use case for changing the behavior?
  reduce technical debt, methods should work

Need to use https://stackoverflow.com/questions/44468888/spring-data-cassandra-how-to-query-tables-with-compound-keys
The easy solution is just to use MapId in the second generic type of the repositories. Maybe add a static method to create MapIds with the correct fields.
Or go full typing and create the primary key class, but it sounds more verbose for little value