title: Mongodb-go-driver interface conversion: interface {} is primitive.ObjectID, not primitive.ObjectID (types from different packages)
body: <p>I can display the result.InsertedID with no problem, however, I keep getting the above error when I attempt to access the value to use it other places. I want to get the value before I leave the method that inserts the new object.  The error message does not make any sense. </p>
  
  <p>I get this error with res.InsertedID.(primitive.ObjectID). What is the proper way?</p>
  
  <p>How do I get the concrete value preferably as a hex string?  Even if I can get the value as a concrete ObjectID and not an interface I would be happy.</p>