code: @BetaApi
    public final Operation deleteNodeGroup(String nodeGroup) {
  
      DeleteNodeGroupHttpRequest request =
          DeleteNodeGroupHttpRequest.newBuilder().setNodeGroup(nodeGroup).build();
      return deleteNodeGroup(request);
    }
docs: Deletes the specified NodeGroup resource.
  
  <p>Sample code:
  
  <pre><code>
  try (NodeGroupClient nodeGroupClient = NodeGroupClient.create()) {
  ProjectZoneNodeGroupName nodeGroup = ProjectZoneNodeGroupName.of("[PROJECT]", "[ZONE]", "[NODE_GROUP]");
  Operation response = nodeGroupClient.deleteNodeGroup(nodeGroup.toString());
  }
  </code></pre>
  
  @param nodeGroup Name of the NodeGroup resource to delete.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails