}
		freeEntry := xlMetaV2Version{Type: DeleteType, WrittenByVersion: globalVersionUnix}
		freeEntry.DeleteMarker = &xlMetaV2DeleteMarker{
			VersionID: vID,
			ModTime:   j.ModTime, // fi.ModTime may be empty
			MetaSys:   make(map[string][]byte),
		}

		freeEntry.DeleteMarker.MetaSys[ReservedMetadataPrefixLower+freeVersion] = []byte{}
		tierKey := ReservedMetadataPrefixLower + TransitionTier

A common choice is Jinja2, the same one used by Flask and other tools.

There are utilities to configure it easily that you can use directly in your **FastAPI** application (provided by Starlette).

## Install dependencies

Make sure you create a [virtual environment](../virtual-environments.md){.internal-link target=_blank}, activate it, and install `jinja2`:

<div class="termy">

```console
$ pip install jinja2

---> 100%
```

	return &Reader{
		args:       args,
		decoder:    d,
		valueCh:    d.Stream(),
		readCloser: readCloser,
	}
}

// syncReadCloser will wrap a readcloser and make it safe to call Close while
// reads are running.
type syncReadCloser struct {
	rc io.ReadCloser
	mu sync.Mutex
}

func (pr *syncReadCloser) Read(p []byte) (n int, err error) {

		}
	}

	if spaceCount == 0 && hexCount == 0 {
		return s
	}

	var buf [64]byte
	var t []byte

	required := len(s) + 2*hexCount
	if required <= len(buf) {
		t = buf[:required]
	} else {
		t = make([]byte, required)
	}

	if hexCount == 0 {
		copy(t, s)
		for i := 0; i < len(s); i++ {
			if s[i] == ' ' {
				t[i] = '+'
			}
		}
		return string(t)
	}

	j := 0

absl::Status SetAttrFunctionList(AbstractOperation*, const char* attr_name,
                                 absl::Span<const AbstractOperation*> values,
                                 ForwardOperation*);

// Make the call to `Tape::RecordOperation`.
absl::Status Execute(AbstractOperation*, AbstractContext*,
                     absl::Span<AbstractTensorHandle*> retvals,
                     int* num_retvals, ForwardOperation*, Tape*,

 * as sub-suites for testing the {@code CharSink} view in the same way.
 *
 * @author Colin Decker
 */
@AndroidIncompatible // TODO(b/230620681): Make this available (even though we won't run it).
public class ByteSinkTester extends SourceSinkTester<ByteSink, byte[], ByteSinkFactory> {

  private static final ImmutableList<Method> testMethods = getTestMethods(ByteSinkTester.class);

 * as sub-suites for testing the {@code CharSink} view in the same way.
 *
 * @author Colin Decker
 */
@AndroidIncompatible // TODO(b/230620681): Make this available (even though we won't run it).
public class ByteSinkTester extends SourceSinkTester<ByteSink, byte[], ByteSinkFactory> {

  private static final ImmutableList<Method> testMethods = getTestMethods(ByteSinkTester.class);

   * document's character encoding can encode any non-ASCII code points in the input (as UTF-8 and
   * other Unicode encodings can).
   *
   * <p><b>Note:</b> This escaper only performs minimal escaping to make content structurally
   * compatible with HTML. Specifically, it does not perform entity replacement (symbolic or
   * numeric), so it does not replace non-ASCII code points with character references. This escaper

  private static final int BYTES = Stats.BYTES * 2 + Double.SIZE / Byte.SIZE;

  /**
   * Gets a byte array representation of this instance.
   *
   * <p><b>Note:</b> No guarantees are made regarding stability of the representation between
   * versions.
   */
  public byte[] toByteArray() {
    ByteBuffer buffer = ByteBuffer.allocate(BYTES).order(ByteOrder.LITTLE_ENDIAN);
    xStats.writeTo(buffer);

			ignoreKeys[ignoreKey] = true
			// if it have already
			delete(checkHeader, ignoreKey)
		default:
			checkHeader[key] = value
		}
	}
	// map to store the metadata
	metaMap := make(map[string]string)
	for _, policy := range postPolicyForm.Conditions.Policies {
		if strings.HasPrefix(policy.Key, "$x-amz-meta-") {
			formCanonicalName := http.CanonicalHeaderKey(strings.TrimPrefix(policy.Key, "$"))