in protobuf/src/internal.rs [164:170]
fn write_message<W: WriterBackend>(&self, w: &mut Writer<W>) -> Result<()> {
for s in &self.logs { w.write_with_tag(10, |w| w.write_message(s))?; }
if let Some(ref s) = self.topic { w.write_with_tag(26, |w| w.write_string(&**s))?; }
if let Some(ref s) = self.source { w.write_with_tag(34, |w| w.write_string(&**s))?; }
for s in &self.log_tags { w.write_with_tag(50, |w| w.write_message(s))?; }
Ok(())
}