multimap.put("foo", 1);
    multimap.put("bar", 2);
    multimap.put("foo", 3);
    assertEquals(ImmutableSet.of(1, 3), multimap.get("foo"));
    assertEquals(2, multimap.expectedValuesPerKey);
  }

  public void testCreateFromMultimap() {
    HashMultimap<String, Integer> multimap = HashMultimap.create();
    multimap.put("foo", 1);
    multimap.put("bar", 2);
    multimap.put("foo", 3);

    unfiltered.put("foo", 55556);
    unfiltered.put("badkey", 1);
    return Multimaps.filterEntries(unfiltered, ENTRY_PREDICATE);
  }

  private static final Predicate<String> KEY_PREDICATE = key -> !Objects.equals(key, "badkey");

  public void testFilterKeys() {
    Multimap<String, Integer> unfiltered = HashMultimap.create();
    unfiltered.put("foo", 55556);
    unfiltered.put("badkey", 1);

     * well-tested. A purist would object to this, but what can I say, we're dirty cheaters.
     */
    map.put(Integer.class, new Integer(5));
    assertThrows(ClassCastException.class, () -> map.put(Double.class, new Long(42)));
    // Won't compile: map.put(String.class, "x");
  }

  public void testPutAndGetInstance() {
    assertThat(map.putInstance(Integer.class, new Integer(5))).isNull();

    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String action = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";
        String direction = event.getRequestType() == TransferEvent.RequestType.PUT ? "to" : "from";

        TransferResource resource = event.getResource();
        StringBuilder message = new StringBuilder();

@Deprecated
public abstract class AbstractModelInterpolatorTest {
    private Properties context;

    @BeforeEach
    public void setUp() {
        context = new Properties();
        context.put("basedir", "myBasedir");
        context.put("project.baseUri", "myBaseUri");
    }

    protected void assertProblemFree(SimpleProblemCollector collector) {
        assertEquals(0, collector.getErrors().size(), "Expected no errors");

        this.out = (out != null) ? out : System.out;
    }

    @Override
    public void transferInitiated(TransferEvent event) {
        String message = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";

        println(
                "transferInitiated",
                message + ": " + event.getResource().getRepositoryUrl()
                        + event.getResource().getResourceName());

      ImmutableSortedMap.Builder<String, String> builder = ImmutableSortedMap.naturalOrder();
      for (Entry<String, String> entry : entries) {
        checkNotNull(entry);
        builder.put(entry.getKey(), entry.getValue());
      }
      return builder.build();
    }
  }

  public static class ImmutableSortedMapCopyOfEntriesGenerator
      extends TestStringSortedMapGenerator {
    @Override

  public void testSortedMapDifferenceTypical() {
    SortedMap<Integer, String> left =
        ImmutableSortedMap.<Integer, String>reverseOrder()
            .put(1, "a")
            .put(2, "b")
            .put(3, "c")
            .put(4, "d")
            .put(5, "e")
            .build();

    SortedMap<Integer, String> right = ImmutableSortedMap.of(1, "a", 3, "f", 5, "g", 6, "z");

        // this is the plugin we're looking for.
        validPluginCounts.put(testPluginArtifactId, 0);

        // these are injected if -DperformRelease=true
        validPluginCounts.put("maven-deploy-plugin", 0);
        validPluginCounts.put("maven-javadoc-plugin", 0);
        validPluginCounts.put("maven-source-plugin", 0);

        Plugin testPlugin = null;

    multimap.put(2, "foo");
    for (String element : elements) {
      multimap.put(3, element);
    }
  }

  static void populateMultimapForKeySet(Multimap<String, Integer> multimap, String[] elements) {
    for (String element : elements) {
      multimap.put(element, 2);
      multimap.put(element, 3);
    }
  }