code: public Connector getConnector(Long chargingStationTypeId, Long evseId, Long id) {
          ChargingStationType chargingStationType = chargingStationTypeRepository.findOne(chargingStationTypeId);
          Evse evse = getEvseById(chargingStationType, evseId);
  
          return getConnectorById(evse, id);
      }
docs: Find a connector based on its id.
  
  @param id the id of the entity to find.
  @return the connector.