var (
	// NoLower disables the lowercasing of non-leading letters for a title
	// caser.
	NoLower Option = noLower

	// Compact omits mappings in case folding for characters that would grow the
	// input. (Unimplemented.)
	Compact Option = compact
)

// TODO: option to preserve a normal form, if applicable?

type options struct {
	noLower bool
	simple  bool

// // LevelFunc sets a function that associates nesting levels with the given text.
// // The levels function will be called with monotonically increasing values for p.
// func LevelFunc(levels func(p int) int) Option {
// 	panic("unimplemented")
// }

// DefaultDirection sets the default direction for a Paragraph. The direction is
// overridden if the text contains directional characters.
func DefaultDirection(d Direction) Option {

TEXT runtime·access(SB),$0-20
	MOVV	R0, 2(R0) // unimplemented, only needed for android; declared in stubs_linux.go
	MOVW	R0, ret+16(FP) // for vet
	RET

TEXT runtime·connect(SB),$0-28
	MOVV	R0, 2(R0) // unimplemented, only needed for android; declared in stubs_linux.go
	MOVW	R0, ret+24(FP) // for vet
	RET

TEXT runtime·socket(SB),$0-20
	MOVV	R0, 2(R0) // unimplemented, only needed for android; declared in stubs_linux.go

	gvk schema.GroupVersionKind
	obj runtime.Object
}

// DeepCopyObject implements runtime.Object interface.
func (m *mockCacheableObject) DeepCopyObject() runtime.Object {
	panic("DeepCopy unimplemented for mockCacheableObject")
}

// GetObjectKind implements runtime.Object interface.
func (m *mockCacheableObject) GetObjectKind() schema.ObjectKind {
	return m
}

      // locks we have already acquired will be released when the VariableInfo
      // objects are destroyed.
      // TODO(b/128495870) Add support for passing aliased resource variables.
      return errors::Unimplemented("Duplicate variable passed to XLA cluster");
    }
    if (variables[i]->read_only()) {
      VLOG(4) << "Acquiring reader lock for variable "
              << reinterpret_cast<void*>(variable);

                                         DefaultXlaOptions().device_type);

  MockXlaCompilerClient mock_client;
  EXPECT_CALL(mock_client, SerializeExecutable(_))
      .WillOnce(Return(errors::Unimplemented("Unimplemented.")));
  EXPECT_CALL(mock_client, BuildSerializedExecutable(_, _))
      .WillOnce(Return(serialized_xla_executable_));

  TF_ASSERT_OK_AND_ASSIGN(auto executable, BuildSampleExecutable());

		0, rsan, rsan, &lrsa, &llen, &rrsa, &rlen)
	lsa, _ := lrsa.Sockaddr()
	rsa, _ := rrsa.Sockaddr()

	netfd.setAddr(netfd.addrFunc()(lsa), netfd.addrFunc()(rsa))
	return netfd, nil
}

// Unimplemented functions.

func (fd *netFD) dup() (*os.File, error) {
	// TODO: Implement this, perhaps using internal/poll.DupCloseOnExec.
	return nil, syscall.EWINDOWS

TEXT runtime·access(SB),$0-20
	MOVD	R0, 0(R0) // unimplemented, only needed for android; declared in stubs_linux.go
	MOVW	R0, ret+16(FP) // for vet
	RET

TEXT runtime·connect(SB),$0-28
	MOVD	R0, 0(R0) // unimplemented, only needed for android; declared in stubs_linux.go
	MOVW	R0, ret+24(FP) // for vet
	RET

TEXT runtime·socket(SB),$0-20
	MOVD	R0, 0(R0) // unimplemented, only needed for android; declared in stubs_linux.go

                                  uint64 size) override {
    // TODO(annarev): figure out if we should support memzero/memset
    // functionality by allocating on host and then copying to device.
    return tsl::errors::Unimplemented(
        "SynchronousMemZero is not supported by pluggable device.");
  }
  absl::Status SynchronousMemcpy(DeviceMemoryBase* gpu_dst,
                                 const void* host_src, uint64 size) override {

}

func (testEncodableDuplicateTag) DeepCopyObject() runtime.Object {
	panic("unimplemented")
}

type testEncodableTagMatchesUntaggedName struct {
	metav1.TypeMeta `json:",inline"`

	A       int
	TaggedA int `json:"A"`
}

func (testEncodableTagMatchesUntaggedName) DeepCopyObject() runtime.Object {
	panic("unimplemented")
}

type staticTextMarshaler int