code: public AirlineItineraryTemplateBuilder addPassengerInfo(String passengerId,
  			String name) {
  		PassengerInfo passengerInfo = new PassengerInfo(passengerId, name);
  		this.payload.addPassengerInfo(passengerInfo);
  		return this;
  	}
docs: Adds a {@link PassengerInfo} object to this template. This field is
  mandatory for this template. There must be at least one element.
  
  @param passengerId
  the passenger ID. It can't be empty.
  @param name
  the passenger name. It can't be empty.
  @return this builder.