code: public static ServiceType serviceType(final String type, final Criticality criticality, final String disasterImpact) {
          return new ServiceType(type, criticality, disasterImpact);
      }
docs: Creates a ServiceType.
  
  @param type The type of the service dependency.
  @param criticality The criticality of the required service for the operation of this service.
  @param disasterImpact Short description of the impact of outages: what would happen if the system is not operational?
  
  @return ServiceType