No .setHeader() method in PicasawebService?

[CoryAlbrecht]

In the v1.47 library one can get from Maven, the PicasawebService class has a setHeader() method that one can use to set the OAuth2 access token to successfully authenticate for GData Picasaweb services.

However, that method is not in this library. Is there another way to use OAuth2 credentials with GData?