Set<List<Integer>> actual = cartesianProduct(set(1, 2), set(3, 4));
    assertTrue(actual.contains(list(1, 3)));
    assertTrue(actual.contains(list(1, 4)));
    assertTrue(actual.contains(list(2, 3)));
    assertTrue(actual.contains(list(2, 4)));
    assertFalse(actual.contains(list(3, 1)));
  }

  public void testCartesianProduct_equals() {

        } else if (jApiMethod.getCompatibilityChanges().contains(METHOD_ADDED_TO_PUBLIC_CLASS) || jApiMethod.getCompatibilityChanges().contains(METHOD_ADDED_TO_INTERFACE)) {
            return isCurrentGetterOfUpgradedProperty(jApiMethod, currentAccessors) || isKotlinBooleanSourceCompatibilityMethod(jApiMethod, currentAccessors);
        } else if (jApiMethod.getCompatibilityChanges().contains(METHOD_RETURN_TYPE_CHANGED)) {

   */
  Range<K> span();

  /**
   * Maps a range to a specified value (optional operation).
   *
   * <p>Specifically, after a call to {@code put(range, value)}, if {@link
   * Range#contains(Comparable) range.contains(k)}, then {@link #get(Comparable) get(k)} will return
   * {@code value}.
   *
   * <p>If {@code range} {@linkplain Range#isEmpty() is empty}, then this is a no-op.
   */
  void put(Range<K> range, V value);

    public void testSessionExpiration () throws Exception {
        Assume.assumeTrue(getContext().getConfig().getResolveOrder().contains(ResolverType.RESOLVER_DNS));
        long start = System.currentTimeMillis() / 1000 * 1000;
        // this is not too great as it depends on timing/clockskew
        // first we need to obtain a ticket, therefor need valid credentials
        // then we need to wait until the ticket is expired

     * <li>nested properties should be defined by a dot, i.e. "user.address.street"</li>
     * <li>indexed properties (java.util.List or array instance) should be contains <code>(\\w+)\\[(\\d+)\\]</code>
     * pattern, i.e. "user.addresses[1].street"</li>
     * <li>mapped properties should be contains <code>(\\w+)\\((.+)\\)</code> pattern,
     *  i.e. "user.addresses(myAddress).street"</li>
     * </ul>
     *

   */
  Range<K> span();

  /**
   * Maps a range to a specified value (optional operation).
   *
   * <p>Specifically, after a call to {@code put(range, value)}, if {@link
   * Range#contains(Comparable) range.contains(k)}, then {@link #get(Comparable) get(k)} will return
   * {@code value}.
   *
   * <p>If {@code range} {@linkplain Range#isEmpty() is empty}, then this is a no-op.
   */
  void put(Range<K> range, V value);

        List<MetadataGraphEdge> exList = excidentEdges.computeIfAbsent(vFrom, k -> new ArrayList<>());

        if (!exList.contains(e)) {
            exList.add(e);
        }

        List<MetadataGraphEdge> inList = incidentEdges.computeIfAbsent(vTo, k -> new ArrayList<>());

        if (!inList.contains(e)) {
            inList.add(e);
        }

        return this;
    }

        } else {
            analyzerName = READING_ANALYZER;
        }
        final String analyzerNameWithlang = isSupportedLanguage(lang) ? analyzerName + '_' + lang : analyzerName;
        if (analyzerNames.contains(analyzerNameWithlang)) {
            return analyzerNameWithlang;
        }
        return analyzerName;
    }

    public String getReadingTermAnalyzerName(final String field, final String lang) {

        // Otherwise, skip this commit.
        List<String> p1Branches = branchesOf(parentCommits[0])
        List<String> p2Branches = branchesOf(parentCommits[1])

        if (p1Branches.contains("origin/master") && !p2Branches.contains("origin/master") && p2Branches.any { it.startsWith("origin/release") }) {
            List<String> badFiles = MONITORED_FILES.grep { isBadFileInMergeCommit(it, commit, parentCommits[0], parentCommits[1]) }

    assertThat(findClassesToTest(ImmutableList.of(PublicFoo.class))).contains(PublicFoo.class);
  }

  public void testFindClassesToTest_ignoreClasses() {
    sanityTests.ignoreClasses(Predicates.<Object>equalTo(PublicFoo.class));
    assertThat(findClassesToTest(ImmutableList.of(PublicFoo.class))).isEmpty();
    assertThat(findClassesToTest(ImmutableList.of(Foo.class))).contains(Foo.class);
  }