Any differences between proto2 and proto3 generated code are highlighted - note that these differences are in the generated code as described in this document, not the base API, which are the same in both versions. You should read the proto2 language guide and/or the proto3 language guide before reading this document. Compiler Invocation The protocol buffer compiler requires a plugin to generate Dart code. Installing it following the instructions provides a protoc-gen-dart binary which protoc...