// See README.txt for information and build instructions.packagetutorial;optionjava_package="com.example.tutorial";optionjava_outer_classname="AddressBookProtos";messagePerson{requiredstringname=1;requiredint32id=2;// Unique ID number for this person.optionalstringemail=3;enumPhoneType{MOBILE=0;HOME=1;WORK=2;}messagePhoneNumber{requiredstringnumber=1;optionalPhoneTypetype=2[default=HOME];}repeatedPhoneNumberphone=4;}// Our address book file is just one of these.messageAddressBook{repeatedPersonperson=1;}