*       typically because the type forbids nullable type arguments: For example, {@code
 *       ImmutableList.get} returns {@code E}, but that value is never {@code null}. (Accordingly,
 *       {@code ImmutableList} is declared to forbid {@code ImmutableList<@Nullable String>}.)
 *   <li>methods whose return type is a type variable but which can return {@code null} regardless

 *       typically because the type forbids nullable type arguments: For example, {@code
 *       ImmutableList.get} returns {@code E}, but that value is never {@code null}. (Accordingly,
 *       {@code ImmutableList} is declared to forbid {@code ImmutableList<@Nullable String>}.)
 *   <li>methods whose return type is a type variable but which can return {@code null} regardless

        final Integer threadCheckCount = (Integer) objs[2];
        if (logger.isDebugEnabled()) {
            if (urlQueue != null && urlQueue.getUrl() != null) {
                logger.debug("{} is not a target url. ({})", urlQueue.getUrl(), threadCheckCount);
            } else {
                logger.debug("The url is null. ({})", threadCheckCount);
            }
        }
    }

    @Test
    void testMirrorLayoutConsideredForMatching() {
        ArtifactRepository repo = getRepo("a");

        Mirror mirrorA = newMirror("a", "a", null, "http://a");
        Mirror mirrorB = newMirror("b", "a", "p2", "http://b");

        Mirror mirrorC = newMirror("c", "*", null, "http://c");
        Mirror mirrorD = newMirror("d", "*", "p2", "http://d");

                    return groovyShell.evaluate(template);
                } catch (final JobProcessingException e) {
                    throw e;
                } catch (final Exception e) {
                    return null;
                } finally {
                    final GroovyClassLoader loader = groovyShell.getClassLoader();
                    loader.clearCache();
                }
            }

            @Override

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

Isso significa que ele **sempre terá um valor**, só que às vezes o valor pode ser `None` (ou `null` em termos de JSON).

    server.enqueue(MockResponse(code = 200, body = "Req1"))
    server.enqueue(MockResponse(code = 200, body = "Req2"))

    val eventListener =
      object : EventListener() {
        var socket: SSLSocket? = null
        var closed = false

        override fun connectionAcquired(
          call: Call,
          connection: Connection,
        ) {
          socket = connection.socket() as SSLSocket
        }

    };
  }

  /**
   * Divides an iterable into unmodifiable sublists of the given size, padding the final iterable
   * with null values if necessary. For example, partitioning an iterable containing {@code [a, b,
   * c, d, e]} with a partition size of 3 yields {@code [[a, b, c], [d, e, null]]} -- an outer
   * iterable containing two inner lists of three elements each, all in the original order.
   *

   *
   * <p><b>Note:</b> essentially the only reason to use this method is when you will need to add or
   * remove elements later. Otherwise, for non-null elements use {@link ImmutableList#of()} (for
   * varargs) or {@link ImmutableList#copyOf(Object[])} (for an array) instead. If any elements
   * might be null, or you need support for {@link List#set(int, Object)}, use {@link
   * Arrays#asList}.
   *

     * Gets the identifier of this repository.
     *
     * @return the (case-sensitive) identifier, never {@code null}
     */
    @Nonnull
    String getId();

    /**
     * Gets the type of the repository, for example "default".
     *
     * @return the (case-sensitive) type of the repository, never {@code null}
     */
    @Nonnull
    String getType();