public void testAddAtIndex_nullSupported() {
    getList().add(0, null);
    expectAdded(0, (E) null);
  }

  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES)
  public void testAddAtIndex_nullUnsupported() {
    assertThrows(NullPointerException.class, () -> getList().add(0, null));
    expectUnchanged();

 */
abstract class EndpointPairIterator<N> extends AbstractIterator<EndpointPair<N>> {
  private final BaseGraph<N> graph;
  private final Iterator<N> nodeIterator;

  @Nullable N node = null; // null is safe as an initial value because graphs don't allow null nodes

  Iterator<N> successorIterator = ImmutableSet.<N>of().iterator();

  static <N> EndpointPairIterator<N> of(BaseGraph<N> graph) {

      entryArray[i] = e;
      V oldValue = forwardDelegate.putIfAbsent(e.getKey(), e.getValue());
      if (oldValue != null) {
        throw conflictException("key", e.getKey() + "=" + oldValue, entryArray[i]);
      }
      K oldKey = backwardDelegate.putIfAbsent(e.getValue(), e.getKey());
      if (oldKey != null) {
        throw conflictException("value", oldKey + "=" + e.getValue(), entryArray[i]);
      }
    }

        }

        Map<String, Object> doc = null;
        try {
            doc = searchHelper.getDocumentByDocId(form.docId, queryFieldConfig.getCacheResponseFields(), getUserBean()).orElse(null);
        } catch (final Exception e) {
            logger.warn("Failed to request: {}", form.docId, e);
        }
        if (doc == null) {

    )
    val request = Request.Builder().url(server.url("/")).build()
    val response = client.newCall(request).execute()
    processResponse(response, listener)
    listener.assertOpen()
    listener.assertEvent(null, null, "hey")
    listener.assertClose()
  }

  @Test
  fun cancelShortCircuits() {
    server.enqueue(
      MockResponse
        .Builder()
        .body(
          """
          |data: hey

    assertEquals(getMethodName() + "(nullNotPresent) should return -1", -1, find(null));
  }

  @CollectionFeature.Require(absent = ALLOWS_NULL_VALUES)
  public void testFind_nullNotContainedAndUnsupported() {
    try {
      assertEquals(getMethodName() + "(nullNotPresent) should return -1 or throw", -1, find(null));
    } catch (NullPointerException tolerated) {
    }
  }

        builder.startObject();
        if (transformerName != null) {
            builder.field(TRANSFORMER_NAME, transformerName);
        }
        if (data != null) {
            builder.field(DATA, data);
        }
        if (encoding != null) {
            builder.field(ENCODING, encoding);
        }
        builder.endObject();
        return builder;
    }

<% if (changelogsByVersionByTypeByArea[version]["security"] != null) { %>
[discrete]
[[security-updates-${unqualifiedVersion}]]
=== Security updates

<% for (change in changelogsByVersionByTypeByArea[version].remove("security").remove("_all_")) {
    print "* ${change.summary}\n"
}
}
if (changelogsByVersionByTypeByArea[version]["known-issue"] != null) { %>
[discrete]
[[known-issues-${unqualifiedVersion}]]
=== Known issues

@Experimental
public class ModelTransformerException extends MavenException {

    public ModelTransformerException() {
        this(null, null);
    }

    public ModelTransformerException(String message) {
        this(message, null);
    }

    public ModelTransformerException(Throwable cause) {
        this(null, cause);
    }

    public ModelTransformerException(String message, Throwable cause) {
        super(message, cause);

            new File(checkoutDir.get(), jdbcProjectDir + "/build/distributions/x-pack-sql-jdbc-" + bwcVersion.get() + "-SNAPSHOT.jar"),
            null
        );

        createBuildBwcTask(
            bwcSetupExtension,
            project,
            bwcVersion,
            "jdbc",
            jdbcProjectDir,
            jdbcProjectArtifact,