It looks that it requires either proto files or somethig like this - <a href="https:&#x2F;&#x2F;github.com&#x2F;rsc-dev&#x2F;pbd&#x2F;blob&#x2F;master&#x2F;examples&#x2F;test.ser" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;rsc-dev&#x2F;pbd&#x2F;blob&#x2F;master&#x2F;examples&#x2F;test.ser</a><p>There is no way to infer attribute names from on the wire representation. In fact, there is no 100% sure way to distinguish between strings and embedded messages.