return token.RetrieveValidatedConfigInfo(&cfg.Discovery, timeout)
	default:
		return nil, errors.New("couldn't find a valid discovery configuration")
	}
}

// isHTTPSURL checks whether the string is parsable as a URL and whether the Scheme is https
func isHTTPSURL(s string) bool {
	u, err := url.Parse(s)
	return err == nil && u.Scheme == "https"

// devices are determined by looking up all TPU devices associated with each
// TPU_SYSTEM:0 device found, alongside associated `topology_attr` and
// `device_assignment_attr`. If `topology_attr` not an empty string (parsable to
// TopologyProto), `device_assignment_attr` must not be empty also. When
// `topology_attr` and `device_assignment_attr` are not empty, a general device
// assignment based on those two attributes are used. Otherwise when

  size_t numRead;
  mlir::Attribute attr = mlir::parseAttribute(input, context, {}, &numRead);
  if (!attr || !mlir::isa<mlir::StringAttr>(attr)) {
    LOG(ERROR) << "Input is not parsable as a MLIR StringAttr.";
    return nullptr;
  }
  auto str_attr = mlir::cast<mlir::StringAttr>(attr);

  mlir::DialectRegistry registry;
  RegisterMlirInputDialects(registry);

//   - there is no annotation - for example the pod was created when the BackoffLimitPerIndex
//     feature was temporarily disabled, or the annotation was manually removed by the user,
//   - the value of the annotation isn't parsable as int - for example because
//     it was set by a malicious user,
//   - the value of the annotation is negative or greater by int32 - for example
//     because it was set by a malicious user.

					t.Errorf("#%d got:%#v want:%#v %x", i, m, m1, marshaled)
					break
				}

				if i >= 3 {
					// The first three message types (ClientHello,
					// ServerHello and Finished) are allowed to
					// have parsable prefixes because the extension
					// data is optional and the length of the
					// Finished varies across versions.
					for j := 0; j < len(marshaled); j++ {
						if m.unmarshal(marshaled[0:j]) {

				}
			}
		}
	}
	return allErrs
}

// ValidateURLs validates the URLs given in the string slice, makes sure they are parsable. Optionally, it can enforces HTTPS usage.
func ValidateURLs(urls []string, requireHTTPS bool, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	for _, urlstr := range urls {
		u, err := url.Parse(urlstr)

  }

  /**
   * Parses a media type from its string representation.
   *
   * @throws IllegalArgumentException if the input is not parsable
   */
  @CanIgnoreReturnValue // TODO(b/219820829): consider removing
  public static MediaType parse(String input) {
    checkNotNull(input);
    Tokenizer tokenizer = new Tokenizer(input);
    try {

  }

  /**
   * Parses a media type from its string representation.
   *
   * @throws IllegalArgumentException if the input is not parsable
   */
  @CanIgnoreReturnValue // TODO(b/219820829): consider removing
  public static MediaType parse(String input) {
    checkNotNull(input);
    Tokenizer tokenizer = new Tokenizer(input);
    try {

		{"1E12", decQuantity(1, 12, DecimalExponent)},
		{"1e15", decQuantity(1, 15, DecimalExponent)},
		{"1E18", decQuantity(1, 18, DecimalExponent)},

		// Nonstandard but still parsable
		{"1e14", decQuantity(1, 14, DecimalExponent)},
		{"1e13", decQuantity(1, 13, DecimalExponent)},
		{"1e3", decQuantity(1, 3, DecimalExponent)},
		{"100.035k", decQuantity(100035, 0, DecimalSI)},

  // Variable is movable, but not copyable.
  Variable(Variable&& other) = default;
  Variable& operator=(Variable&& other) = default;

  ~Variable() override;

 private:
  Variable(ImmediateExecutionContext* ctx, DataType dtype, TensorShape shape,
           absl::optional<std::string> name, ImmediateTensorHandlePtr handle);
  Variable(const Variable& variable) = delete;
  Variable& operator=(const Variable&) = delete;