// failure.
template <typename OpT>
LogicalResult GetOp(Region* region, OpT* result) {
  *result = {};
  for (auto op : region->getOps<OpT>()) {
    if (*result) return op.emitError("should be unique within a function");
    *result = op;
  }
  return success();
}

LogicalResult RunOnRegion(Region* region) {
  RecvTPUEmbeddingActivationsOp recv_op;
  if (failed(GetOp(region, &recv_op))) return failure();

	}
	return newAPIEndpoints
}

// Prints common server startup message. Prints credential, region and browser access.
func printServerCommonMsg(apiEndpoints []string) {
	// Get saved credentials.
	cred := globalActiveCred

	// Get saved region.
	region := globalSite.Region()

	apiEndpointStr := strings.TrimSpace(strings.Join(apiEndpoints, "  "))
	// Colorize the message and print.

// returns ErrNone if the signature matches.
func doesPolicySignatureV4Match(formValues http.Header) (auth.Credentials, APIErrorCode) {
	// Server region.
	region := globalSite.Region()

	// Parse credential tag.
	credHeader, s3Err := parseCredentialHeader("Credential="+formValues.Get(xhttp.AmzCredential), region, serviceS3)
	if s3Err != ErrNone {
		return auth.Credentials{}, s3Err
	}

	r := &http.Request{Header: formValues}

		},
		{
			name:     "locality with only region",
			locality: "region",
			want: &core.Locality{
				Region: "region",
			},
		},
		{
			name:     "locality with region and zone",
			locality: "region/zone",
			want: &core.Locality{
				Region: "region",
				Zone:   "zone",
			},
		},
		{
			name:     "locality with region zone and subzone",
			locality: "region/zone/subzone",

	return descendents
}

// UserRegionSummary represents a region and goroutine execution stats
// while the region was active. (For v2 traces.)
type UserRegionSummary struct {
	TaskID TaskID
	Name   string

	// Region start event. Normally EventRegionBegin event or nil,
	// but can be a state transition event from NotExist or Undetermined
	// if the region is a synthetic region representing task inheritance
	// from the parent goroutine.

				if testName == "user_task_region_1_21_good" {
					testedUserRegions = true
					validRegions := map[string]struct{}{
						"post-existing region": struct{}{},
						"region0":              struct{}{},
						"region1":              struct{}{},
					}
					// Check that we correctly convert user regions. These
					// strings were generated by
					// runtime/trace.TestUserTaskRegion, which is the basis for

            FunctionalControlFlowToRegionsPassOptions{allow_passthrough_args}) {
  }
  void runOnOperation() override;
};

// Creates a call to function `func` in region `caller_region`. Use `args` as
// the call arguments, and terminate the region with a yield. The arguments are
// cast to the required type before the call. `use_region_args` control whether
// the input arguments are used as is (for IfOp) or block arguments of the same

  auto walk_result = parent_op->walk([](Operation *op) {
    // Cleanup code in attached regions.
    for (Region &region : op->getRegions()) {
      if (!llvm::hasSingleElement(region)) return WalkResult::interrupt();
      RemovePassthroughOp(region.front());
      RemoveDeadLocalVariables(region.front());
    }

    LogicalResult result = success();

  }

  // Returns if its legal to inline 'src' region into the 'dest' region
  // attached to a TF Device operation.
  bool isLegalToInline(Region* dest, Region* src, bool wouldBeCloned,
                       IRMapping& valueMapping) const final {
    return true;
  }

  // Defines the legality of inlining TF Device operations into a region.
  bool isLegalToInline(Operation* call, Region*, bool, IRMapping&) const final {
    return true;

  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