protobuffs

package packed_repeated;

message Person { 
	required string name = 1;
	required string address = 2;
	required string phone_number = 3;
	required int32 age = 4;
	repeated string hobbies = 5 [packed=false];
	repeated Location locations = 6;
	repeated uint32 ids = 7 [packed=true];
}

message Location {
    required string region = 1;
    required string country = 2;
}