docs: public ListBackupVaultsResult withBackupVaultList(BackupVaultListMember... backupVaultList) {
          if (this.backupVaultList == null) {
              setBackupVaultList(new java.util.ArrayList<BackupVaultListMember>(backupVaultList.length));
          }
          for (BackupVaultListMember ele : backupVaultList) {
              this.backupVaultList.add(ele);
          }
          return this;
      }