} else if (code in 1004..1006 || code in 1015..2999) {
      "Code $code is reserved and may not be used."
    } else {
      null
    }

  fun validateCloseCode(code: Int) {
    val message = closeCodeExceptionMessage(code)
    require(message == null) { message!! }
  }

  fun acceptHeader(key: String): String = (key + ACCEPT_MAGIC).encodeUtf8().sha1().base64()

          public @Nullable Void call() throws Exception {
            // adds two nanoseconds to the ticker
            ticker.advance(1L);
            Thread.sleep(10);
            ticker.advance(1L);
            return null;
          }
        });

    assertEquals(numberOfThreads * 2, ticker.read());
  }

  @GwtIncompatible // concurrency

  public void testConcurrentAutoIncrementStep() throws Exception {

<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image02.png">
</div>

Esto significa que **siempre tendrá un valor**, solo que a veces el valor podría ser `None` (o `null` en JSON).

      Ordering.<Integer>natural().<Integer>nullsFirst();

  private static final List<@Nullable Integer> IN_ORDER_VALUES =
      unmodifiableList(Arrays.<@Nullable Integer>asList(null, 1, 2, 3, 4, 5));

  public void testCreateEmptyRangeFails() {
    for (BoundType lboundType : BoundType.values()) {
      for (BoundType uboundType : BoundType.values()) {
        assertThrows(

	Roles                  Roles                  `gorm:"serializer:json"`
	Roles2                 *Roles                 `gorm:"serializer:json"`
	Roles3                 *Roles                 `gorm:"serializer:json;not null"`
	Contracts              map[string]interface{} `gorm:"serializer:json"`
	JobInfo                Job                    `gorm:"type:bytes;serializer:gob"`

1}),k===!1?(b.trigger("validation",!1),m.errorMsg=l,m.isValid=!1,m.shouldChangeDisplay=!0):null===k?m.shouldChangeDisplay=!1:(b.trigger("validation",!0),m.shouldChangeDisplay=!0),"function"==typeof d.onElementValidate&&null!==l&&d.onElementValidate(m.isValid,b,e,l),b.trigger("afterValidation",[m,f]),m},parseDate:function(b,c,d){var e,f,g,h,i=c.replace(/[a-zA-Z]/gi,"").substring(0,1),j="^",k=c.split(i||null);if(a.each(k,function(a,b){j+=(a>0?"\\"+i:"")+"(\\d{"+b.length+"})"}),j+="$",d){var l=[];a...

            .isNotEqualTo(returnType);
      } catch (IllegalArgumentException notSubtype2) {
        // The raw class isn't even a subclass.
      }
    }
    return null;
  }

  final void testAllDeclarations() throws Exception {
    checkState(method == null);
    Method[] methods = getClass().getMethods();
    Arrays.sort(
        methods,
        new Comparator<Method>() {
          @Override

    Object unused =
        new Object() {
          @SuppressWarnings({"removal", "Finalize"}) // b/260137033
          @Override
          protected void finalize() {
            future.set(null);
          }
        };
    unused = null; // Hint to the JIT that unused is unreachable
    GcFinalization.awaitDone(future);
    assertTrue(future.isDone());
    assertFalse(future.isCancelled());
  }

     * @return {@link Locale}
     */
    public static Locale getLocale(final String localeStr) {
        // TODO replace with Fess
        Locale locale = LocaleUtil.getDefault();
        if (localeStr != null) {
            final int index = localeStr.indexOf('_');
            if (index < 0) {
                locale = new Locale(localeStr);
            } else {
                final String language = localeStr.substring(0, index);

                                                                test="${data.hostname==null||data.hostname==''}">
                                                            <la:message key="labels.webauth_any"/>
                                                        </c:if> ${f:h(data.hostname)}: <c:if
                                                                test="${data.port==null||data.port==''}">