code: public java.lang.String getCreatedBy() {
      java.lang.Object ref = createdBy_;
      if (ref instanceof java.lang.String) {
        return (java.lang.String) ref;
      } else {
        com.google.protobuf.ByteString bs = 
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        createdBy_ = s;
        return s;
      }
    }
docs: <pre>
  Email address of the user who created this version.
  &#64;OutputOnly
  </pre>
  
  <code>string created_by = 16;</code>