code: public KeyRestoreParameters withKeyBundleBackup(byte[] keyBundleBackup) {
          if (keyBundleBackup == null) {
              this.keyBundleBackup = null;
          } else {
              this.keyBundleBackup = Base64Url.encode(keyBundleBackup);
          }
          return this;
      }
docs: Set the keyBundleBackup value.
  
  @param keyBundleBackup the keyBundleBackup value to set
  @return the KeyRestoreParameters object itself.