code: @BetaApi
    public final Operation insertNetworkEndpointGroup(
        String zone, NetworkEndpointGroup networkEndpointGroupResource) {
  
      InsertNetworkEndpointGroupHttpRequest request =
          InsertNetworkEndpointGroupHttpRequest.newBuilder()
              .setZone(zone)
              .setNetworkEndpointGroupResource(networkEndpointGroupResource)
              .build();
      return insertNetworkEndpointGroup(request);
    }
docs: Creates a network endpoint group in the specified project using the parameters that are
  included in the request.
  
  <p>Sample code:
  
  <pre><code>
  try (NetworkEndpointGroupClient networkEndpointGroupClient = NetworkEndpointGroupClient.create()) {
  ProjectZoneName zone = ProjectZoneName.of("[PROJECT]", "[ZONE]");
  NetworkEndpointGroup networkEndpointGroupResource = NetworkEndpointGroup.newBuilder().build();
  Operation response = networkEndpointGroupClient.insertNetworkEndpointGroup(zone.toString(), networkEndpointGroupResource);
  }
  </code></pre>
  
  @param zone The name of the zone where you want to create the network endpoint group. It should
  comply with RFC1035.
  @param networkEndpointGroupResource Represents a collection of network endpoints.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails