code: public ListBackupsResult withBackupSummaries(BackupSummary... backupSummaries) {
          if (this.backupSummaries == null) {
              setBackupSummaries(new java.util.ArrayList<BackupSummary>(backupSummaries.length));
          }
          for (BackupSummary ele : backupSummaries) {
              this.backupSummaries.add(ele);
          }
          return this;
      }
docs: <p>
  List of <code>BackupSummary</code> objects.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setBackupSummaries(java.util.Collection)} or {@link #withBackupSummaries(java.util.Collection)} if you
  want to override the existing values.
  </p>
  
  @param backupSummaries
  List of <code>BackupSummary</code> objects.
  @return Returns a reference to this object so that method calls can be chained together.