new URI("s3://somebucket.au.s3.eu-central-1.amazonaws.com/a/b/file.txt")      | Optional.of(getRegion(Regions.EU_CENTRAL_1))                        | 'somebucket.au' | 'a/b/file.txt'

        PropagatePotentiallyWrittenUpFromCallee(func.getRegion(),
                                                call.getArgOperands());
      }
      return;
    }
    if (auto if_op = dyn_cast<TF::IfOp>(op)) {
      for (auto callee : {if_op.then_function(), if_op.else_function()}) {
        PropagatePotentiallyWrittenUpFromCallee(callee.getRegion(),
                                                if_op.getInput());

            String key = matcher.group(4);
            Region derivedRegion;
            if (region.equals("external-1")) {
                derivedRegion = Region.getRegion(Regions.US_EAST_1);
            } else {
                derivedRegion = RegionUtils.getRegion(region);
            }

            this.region = Optional.of(derivedRegion);
            this.bucketName = bucketName;
            this.key = key;

	if err != nil {
		log.Debugf("error in getting aws info for %s : %v", path, err)
		return "", err
	}
	return resp.String(), nil
}

// getRegion returns the Region that the instance is running in.
func getRegion(ipv6 bool, headers map[string]string) string {
	region, _ := getAWSInfo("placement/region", ipv6, headers)
	return region
}

      SetExportedName(other, name);
      module_body.push_front(other);
      other.addEntryBlock();
      OpBuilder builder(other.getRegion());
      auto call_op = builder.create<mlir::func::CallOp>(
          f.getLoc(), f.getFunctionType().getResults(), f.getSymName(),
          other.getRegion().getArguments());
      builder.create<mlir::func::ReturnOp>(f.getLoc(), call_op.getResults());
    }

    Unexport(f);
  }
}

  added_call_op->setAttr(kInterfaceNameAttr, interface_name);

  StringAttr device = mlir::cast<StringAttr>(
      added_func_op->getRegion(0).getBlocks().front().front().getAttr(kDevice));
  StringAttr inference_type = mlir::cast<StringAttr>(
      added_func_op->getRegion(0).getBlocks().front().front().getAttr(
          kInferenceType));
  added_call_op->setAttr(kDevice, device);

  );

  let results = (outs
    Variadic<AnyType>:$results
  );

  let regions = (region SizedRegion<1>:$body);

  let extraClassDeclaration = [{
    Block &GetBody() { return getOperation()->getRegion(0).front(); }
    bool WrapsSingleOp();
  }];

  let builders = [
    OpBuilder<(ins "StringAttr":$device, "TypeRange":$result_types),
    [{
      $_state.addAttribute("device", device);

    return WalkResult::advance();
  });
  if (walk_result.wasInterrupted()) return signalPassFailure();
  // Move all remaining nested functions back into the parent module.
  Block &nested_block = nested_module->getRegion(0).front();
  for (func::FuncOp func_op :
       llvm::make_early_inc_range(nested_block.getOps<func::FuncOp>())) {
    if (!symbol_table.lookupSymbolIn(getOperation(), func_op.getName())) {

      // Skip the folding logic if the block argument is not from the function
      // arguments. This can happen when the argument is from a while loop.
      if (block_arg.getParentRegion() != &func_op.getRegion()) {
        return false;
      }
      if (StringAttr attr = func_op.getArgAttrOfType<StringAttr>(
              block_arg.getArgNumber(), kTFDeviceAttr)) {
        return op_device == attr;
      }

func IsLocalityEmpty(locality *core.Locality) bool {
	if locality == nil || (len(locality.GetRegion()) == 0) {
		return true
	}
	return false
}

func LocalityMatch(proxyLocality *core.Locality, ruleLocality string) bool {
	ruleRegion, ruleZone, ruleSubzone := label.SplitLocalityLabel(ruleLocality)
	regionMatch := ruleRegion == "*" || proxyLocality.GetRegion() == ruleRegion