protobuf syntax = "proto3"; message Person { string name = 1; int32 age = 2; repeated string hobbies = 3; } kotlin val person = Person.newBuilder() .setName("John Doe") .setAge(30) .addHobbies("Reading") .addHobbies("Running") .build() val serializedData = person.toByteArray() val deserializedPerson = Person.parseFrom(serializedData)