public Builder setOauthToken(
        com.google.cloud.tasks.v2beta3.OAuthToken.Builder builderForValue) {
      if (oauthTokenBuilder_ == null) {
        authorizationHeader_ = builderForValue.build();
        onChanged();
      } else {
        oauthTokenBuilder_.setMessage(builderForValue.build());
      }
      authorizationHeaderCase_ = 5;
      return this;
    }
<pre>
If specified, an
[OAuth token](https://developers.google.com/identity/protocols/OAuth2)
will be generated and attached as the `Authorization` header in the HTTP
request.

This type of authorization should generally only be used when calling
Google APIs hosted on *.googleapis.com.
</pre>

<code>.google.cloud.tasks.v2beta3.OAuthToken oauth_token = 5;</code>
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/HttpTarget.java