* @throws NullPointerException if any element in the stream is {@code null}.
   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be
   *     {@code null}) and returns {@code Optional.empty()} if it has none.
   */
  @SuppressWarnings("unchecked")
  public static <T> Collector<T, ?, Optional<T>> toOptional() {
    return (Collector) TO_OPTIONAL;

   * if the returned {@link Iterable} contains duplicate elements. Implementations of such
   * algorithms should document their behavior in the presence of duplicates.
   *
   * <p>The elements of the returned {@code Iterable} must each be:
   *
   * <ul>
   *   <li>Non-null
   *   <li>Usable as {@code Map} keys (see the Guava User Guide's section on <a

 *   new MySubtypeTests().testAllDeclarations();
 * }
 * }</pre>
 *
 * The calls to {@link #isSubtype} and {@link #notSubtype} tells the framework what assertions need
 * to be made.
 *
 * <p>The declaration methods must be public.
 */
@AndroidIncompatible // only used by android incompatible tests.
abstract class SubtypeTester implements Cloneable {

  /** Annotates a public method that declares subtype assertion. */

		nspathInContainer := filepath.Join(hostMountsPath, nspath)
		ns, err := OpenNetns(nspathInContainer)
		if err != nil {
			err = fmt.Errorf("failed to open netns: %w. Make sure that the netns host path %s is mounted in under %s in the container", err, nspath, hostMountsPath)
			log.Error(err.Error())
		}
		return ns, err
	}

#### Documentation

Provides cross-cutting Gradle documentation and samples, along with the infrastructure to write, test, publish and host the documentation.

## Status

ACCEPTED

## Consequences

- Assign ownership of each architecture module to one team.
- Assign each source file to one architecture module.

</div>

...⚖️ 🙆 🎏 🔫 💽.

////

## 🏃 💽 📋

👆 💪 ⤴️ 🏃 👆 🈸 🎏 🌌 👆 ✔️ ⌛ 🔰, ✋️ 🍵 `--reload` 🎛, ✅:

//// tab | Uvicorn

<div class="termy">

```console
$ uvicorn main:app --host 0.0.0.0 --port 80

<span style="color: green;">INFO</span>:     Uvicorn running on http://0.0.0.0:80 (Press CTRL+C to quit)
```

</div>

////

//// tab | Hypercorn

<div class="termy">

fi

if [ ! -x "$JAVA" ]; then
    echo "Could not find any executable java binary. Please install java in your PATH or set JAVA_HOME"
    exit 1
fi

if [ -z "$FESS_CLASSPATH" ]; then
    echo "You must set the FESS_CLASSPATH var" >&2
    exit 1
fi

# Special-case path variables.
case `uname` in
    CYGWIN*)
        FESS_CLASSPATH=`cygpath -p -w "$FESS_CLASSPATH"`
        FESS_HOME=`cygpath -p -w "$FESS_HOME"`

 * {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")
// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")

 *   new MySubtypeTests().testAllDeclarations();
 * }
 * }</pre>
 *
 * The calls to {@link #isSubtype} and {@link #notSubtype} tells the framework what assertions need
 * to be made.
 *
 * <p>The declaration methods must be public.
 */
@AndroidIncompatible // only used by android incompatible tests.
abstract class SubtypeTester implements Cloneable {

  /** Annotates a public method that declares subtype assertion. */

   * This is primarily useful in a finally block, where a thrown exception needs to be logged but
   * not propagated (otherwise the original exception will be lost).
   *
   * <p>If {@code swallowIOException} is true then we never throw {@code IOException} but merely log
   * it.
   *
   * <p>Example:
   *
   * <pre>{@code