auto& region = op->getRegion(region_idx);
  region.getArgument(0).replaceAllUsesWith(implicit_operand);
  region.front().eraseArguments(0, region.getNumArguments());
}

// Rewrites an `mhlo.if` op or its region. If `region_idx` is not set, the op
// operands and results are rewritten. If `region_idx` is set, region

  }

  // Returns if its legal to inline 'src' region into the 'dest' region
  // attached to a TF operation.
  bool isLegalToInline(Region *dest, Region *src, bool wouldBeCloned,
                       IRMapping &valueMapping) const final {
    // Allow inlining in regions attached to region based control flow
    // operations only if the src region is a single block region

         *
         * Lock file is {@link java.io.RandomAccessFile} that has two regions:
         * - lock state region, locked for the duration of the operation
         * - lock info region, locked just to write the lock info or read info from it
         * <br><br>
         *
         * Algorithm:<br>
         * 1. We first try to acquire a lock on the state region with retries, see {@link #lockStateRegion(LockMode)}.<br>

    --project "${PROJECT}" \
    --region "${REGION}" \
    --protocol tcp \
    --region "${REGION}" \
    --load-balancing-scheme internal \
    --health-checks "${MASTER_NAME}-hc"

  gcloud compute forwarding-rules create "${MASTER_NAME}-internal" \
    --project "${PROJECT}" \
    --region "${REGION}" \
    --load-balancing-scheme internal \
    --network "${NETWORK}" \

  SymbolUserMap symbol_map(table, module);

  // Regions that contains ops requiring token input attributes.
  absl::flat_hash_set<Region*> regions_with_token;
  while (!worklist.empty()) {
    Operation* op = worklist.back();
    worklist.pop_back();

    Region* region = op->getParentRegion();
    regions_with_token.insert(region);

  }

  // Checks if a region only consists of ops that are quantizable in a nested
  // region.
  // tf.CustomAggregator op cannot be inserted into region of a StableHLO op,
  // thus calibration is impossible within a nested region. Therefore, when an
  // op involves a region, the op is only quantizable when the region only
  // consists of ops whose quantization parameters can be propagated from

					},
				},
				Locality: &core.Locality{
					Region: "myregion",
				},
			},
			expected: labels.Instance{
				"k1":                       "v1",
				NodeRegionLabelGA:          "myregion",
				label.TopologyNetwork.Name: "mynetwork",
			},
		},
		{
			name: "region and zone",
			ctl:  testController{},
			proxy: &model.Proxy{
				Labels: labels.Instance{

			return
		}

		region = regionKV.Get(RegionName)
	}
	if region != "" {
		if !validRegionRegex.MatchString(region) {
			err = Errorf(
				"region '%s' is invalid, expected simple characters such as [us-east-1, myregion...]",
				region)
			return
		}
		s.region = region
	}

	}

	cred, _, errCode = checkKeyValid(r, signV4Values.Credential.accessKey)
	if errCode != ErrNone {
		return cred, "", "", time.Time{}, errCode
	}

	// Verify if region is valid.
	region = signV4Values.Credential.scope.region

	// Extract date, if not present throw error.
	var dateStr string
	if dateStr = req.Header.Get("x-amz-date"); dateStr == "" {
		if dateStr = r.Header.Get("Date"); dateStr == "" {

	ctx, t = trace.NewTask(ctx, "do")
	defer t.End()

	trace.Log(ctx, "log2", "do")

	// Create a region and spawn more tasks and more workers.
	trace.WithRegion(ctx, "fanout", func() {
		for i := 0; i < k; i++ {
			go func(i int) {
				trace.WithRegion(ctx, fmt.Sprintf("region%d", i), func() {
					trace.Logf(ctx, "log", "fanout region%d", i)
					if i == 2 {
						do(ctx, 0)
						return
					}
				})
			}(i)
		}
	})