The `str | None` (Python 3.10+) or `Union` in `Union[str, None]` (Python 3.8+) is not used by FastAPI to determine that the value is not required, it will know it's not required because it has a default value of `= None`.

But adding the type annotations will allow your editor to give you better support and detect errors.

///

## Without Pydantic { #without-pydantic }

    *   Going forward we operate in TF 2.0, this change is part of the effort to
        slowly converting XYZDataset to DatasetV2 type which is the official
        version going to be used in TF 2.0 and motivated by some compatibility
        issue found, _BigtableXYZDataset (of type DatasetV2) does not implement
        the _as_variant_tensor() of DatasetV1, when moving contrib.bigtable to

	}

	dedupVersions := make([]FileInfoVersions, 0, len(versionsMap))
	for _, fivs := range versionsMap {
		// Removal of existing versions and adding a delete marker in the same
		// request is supported. At the same time, we cannot allow adding
		// two delete markers on top of any object. To avoid this situation,
		// we will sort deletions to execute existing deletion first,

            }

            if (closed) {
              throw IOException("stream closed")
            } else if (readBuffer.size > 0L) {
              // Prepare to read bytes. Start by moving them to the caller's buffer.
              readBytesDelivered = readBuffer.read(sink, minOf(byteCount, readBuffer.size))
              readBytes.update(total = readBytesDelivered)

   * other using {@code second = new PairedStatsAccumulator().addAll(first).snapshot()}, if both
   * were obtained by calling {@code snapshot()} on the same {@link PairedStatsAccumulator} without
   * adding any values in between the two calls, or if one is obtained from the other after
   * round-tripping through java serialization. However, floating point rounding errors mean that it

 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package jcifs;

/**
 * Utility class holding several protocol constrants
 *
 * @author mbechler
 *
 *
 * <p>This interface is intended for internal use.</p>
 */
public interface SmbConstants {

    /**

    class DoShareEnumValidation {

        static Stream<Arguments> invalidShareEnumCases() {
            return Stream.of(
                    // Missing trailing slash -> should complain about directory ending
                    Arguments.of("smb://server/share", "/share", true),
                    // Not a server root -> invalid list operation
                    Arguments.of("smb://server/share/", "/share/", false));
        }

        // Then
        assertNotNull(exception.getContext());
        assertTrue(exception.getContext().isEmpty());

        // Adding null context should be safe
        exception.withContext(null);
        assertTrue(exception.getContext().isEmpty());
    }

    @Test
    @DisplayName("Should be serializable")

        </field>
        <field>
          <name>version</name>
          <version>1.0.0+</version>
          <type>String</type>
          <description>The base version (i.e. ending in {@code -SNAPSHOT}) when this directory represents a "groupId/artifactId/version" for a SNAPSHOT.</description>
        </field>
        <field xdoc.separator="blank">
          <name>plugins</name>

<div class="termy">

```console
$ pip install "uvicorn[standard]"

---> 100%
```

</div>

A similar process would apply to any other ASGI server program.

/// tip

By adding the `standard`, Uvicorn will install and use some recommended extra dependencies.

That including `uvloop`, the high-performance drop-in replacement for `asyncio`, that provides the big concurrency performance boost.