code: public List<Acl> listBucketAcls(String bucketName) {
      // [START listBucketAcls]
      List<Acl> acls = storage.listAcls(bucketName);
      for (Acl acl : acls) {
        // do something with ACL entry
      }
      // [END listBucketAcls]
      return acls;
    }
docs: [VARIABLE "my_unique_bucket"]