* It provides methods to get and set the name and value of the header,
 * as well as a method to validate the header.
 *
 * <p>Example usage:</p>
 * <pre>
 *     RequestHeader header = new RequestHeader("Content-Type", "application/json");
 *     String name = header.getName();
 *     String value = header.getValue();
 *     boolean isValid = header.isValid();
 * </pre>
 *

                    && recorder.hasReachedMaxLevel()) {
                event.getSession()
                        .getResult()
                        .addException(
                                new Exception("Build failed due to log statements with a higher severity than allowed. "
                                        + "Fix the logged issues or remove flag --fail-on-severity (-fos)."));
            }

    long x = seed;
    @SuppressWarnings("ConstantOverflow")
    long y = seed * K1 + 113;
    long z = shiftMix(y * K2 + 113) * K2;
    long[] v = new long[2];
    long[] w = new long[2];
    x = x * K2 + load64(bytes, offset);

    // Set end so that after the loop we have 1 to 64 bytes left to process.
    int end = offset + ((length - 1) / 64) * 64;

    "old key": "old value",
    "second old key": "second old value",
}
new_dict = {**old_dict, "new key": "new value"}
```

Aquí, `new_dict` contendrá todos los pares clave-valor de `old_dict` más el nuevo par clave-valor:

```Python
{
    "old key": "old value",
    "second old key": "second old value",
    "new key": "new value",
}
```

    "second old key": "second old value",
}
new_dict = {**old_dict, "new key": "new value"}
```

Hier wird `new_dict` alle Schlüssel-Wert-Paare von `old_dict` plus das neue Schlüssel-Wert-Paar enthalten:

```Python
{
    "old key": "old value",
    "second old key": "second old value",
    "new key": "new value",
}
```

    // Don't bother testing: Verify is like Preconditions. See the discussion on that class.
  }

  private static final Object IGNORE_ME =
      new Object() {
        @Override
        public String toString() {
          throw new AssertionFailedError();
        }
      };

  private static final String FORMAT = "I ate %s pies.";

  private static void checkMessage(Exception e) {

  static final Absent<Object> INSTANCE = new Absent<>();

  @SuppressWarnings("unchecked") // implementation is "fully variant"
  static <T> Optional<T> withType() {
    return (Optional<T>) INSTANCE;
  }

  private Absent() {}

  @Override
  public boolean isPresent() {
    return false;
  }

  @Override
  public T get() {

  public void testValues() {
    List<V> expected = new ArrayList<>();
    for (Entry<K, V> entry : getSampleElements()) {
      expected.add(entry.getValue());
    }
    assertEqualIgnoringOrder(expected, multimap().values());
  }

  @CollectionFeature.Require(KNOWN_ORDER)
  public void testValuesInOrder() {
    List<V> expected = new ArrayList<>();
    for (Entry<K, V> entry : getOrderedElements()) {

    assertThat(nullEntry.toString()).isEqualTo("(null,null)=null");
  }

  public void testEntryEquals() {
    Cell<String, Integer, Character> entry = immutableCell("foo", 1, 'a');

    new EqualsTester()
        .addEqualityGroup(entry, immutableCell("foo", 1, 'a'))
        .addEqualityGroup(immutableCell("bar", 1, 'a'))
        .addEqualityGroup(immutableCell("foo", 2, 'a'))

        assertArgumentNotNull("driver", driver);

        try {
            DriverManager.registerDriver(driver);
        } catch (final SQLException e) {
            throw new SQLRuntimeException(e);
        }
    }

    /**
     * Deregisters a JDBC driver.
     *
     * @param driver
     *            The JDBC driver to deregister. Must not be {@literal null}.
     */