title: serializeBinary() not found using google-protobuf on nodejs
body: <p>I could really use some help.  I am trying to follow along on the google-protobuf example:
  <a href="https://www.npmjs.com/package/google-protobuf" rel="nofollow noreferrer">https://www.npmjs.com/package/google-protobuf</a></p>
  
  <p>However, when I try this line of code:
  // Serializes to a UInt8Array.
  var bytes = message.serializeBinary();</p>
  
  <p>I get a Type Error saying that serializeBinary is not a function.</p>
  
  <p>Is there a different function, or something I am missing?  I could really use the help.</p>
  
  <p>Best Regards,</p>
  
  <p>Mike</p>