// Attributes characterizing the amenities and ride comfort of a journey on a// vehicle.messageServiceClass{// A high level enum describing the service class type.enumServiceClassType{// Global service classesFIRST_CLASS=1;SECOND_CLASS=2;// Only a single service class is offered by the operator. The service class// may not even have a name because there is no distinction to be made.SINGLE_CLASS=3;BUSINESS_CLASS=4;// Additional global or per-market service classes can be added. Please// reach out to the Google Transport team if additional service classes are// needed for your use case.// Japan specific train ticket classesNON_RESERVED_SECOND_CLASS=201;RESERVED_SECOND_CLASS=202;RESERVED_GREEN_CAR_CLASS=203;RESERVED_GRAN_CLASS=204;// Brazil specific service classes.CONVENCIONAL=205;EXECUTIVO=206;SEMILEITO=207;LEITO=208;CAMA=209;}ServiceClassTypetype=1;}