code: public com.google.protobuf.ByteString
        getAuthDomainBytes() {
      java.lang.Object ref = authDomain_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        authDomain_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
docs: <pre>
  Google Apps authentication domain that controls which users can access
  this application.
  Defaults to open access for any Google Account.
  </pre>
  
  <code>string auth_domain = 6;</code>