docs: @BetaApi
    public final ListNodesNodeGroupsPagedResponse listNodesNodeGroups(
        ProjectZoneNodeGroupName nodeGroup) {
      ListNodesNodeGroupsHttpRequest request =
          ListNodesNodeGroupsHttpRequest.newBuilder()
              .setNodeGroup(nodeGroup == null ? null : nodeGroup.toString())
              .build();
      return listNodesNodeGroups(request);
    }