docs: @BetaApi
    public final Policy setIamPolicyNodeGroup(
        String resource, ZoneSetPolicyRequest zoneSetPolicyRequestResource) {
  
      SetIamPolicyNodeGroupHttpRequest request =
          SetIamPolicyNodeGroupHttpRequest.newBuilder()
              .setResource(resource)
              .setZoneSetPolicyRequestResource(zoneSetPolicyRequestResource)
              .build();
      return setIamPolicyNodeGroup(request);
    }