package Game.Cars; // Car message Car { // Car Vendor message Vendor { required string name = 1; // Car Vendor Address message Address { required string country = 1; } optional Address address = 2; repeated string models = 3; // The models sold here. } required string model = 1; // Model name required Vendor vendor = 2; // Vendor information optional Speed speed = 3 [default=FAST]; // Car speed // Car speed enum enum Speed { FAST = 1; SUPERFAST = 2; } // Car Holder message Holder { optional string first_name = 1; required string last_name = 2; optional Vendor.Address address = 3; } }