@GwtCompatible
final class CollectPreconditions {

  static void checkEntryNotNull(@Nullable Object key, @Nullable Object value) {
    if (key == null) {
      throw new NullPointerException("null key in entry: null=" + value);
    } else if (value == null) {
      throw new NullPointerException("null value in entry: " + key + "=null");
    }
  }

  @CanIgnoreReturnValue
  static int checkNonnegative(int value, String name) {
    if (value < 0) {

                    e);

            return null;
        }

        return artifactFactory.createPluginArtifact(plugin.getGroupId(), plugin.getArtifactId(), versionRange);
    }

    public ArtifactRepositoryPolicy buildArtifactRepositoryPolicy(RepositoryPolicy policy) {
        boolean enabled = true;

        String updatePolicy = null;

        String checksumPolicy = null;

        if (policy != null) {

   *
   * <p>Example:
   *
   * {@snippet :
   * Ordering.allEqual().nullsLast().sortedCopy(asList(t, null, e, s, null, t, null))
   * }
   *
   * <p>Assuming {@code t}, {@code e} and {@code s} are non-null, this returns {@code [t, e, s, t,
   * null, null, null]} regardless of the true comparison order of those three values (which might
   * not even implement {@link Comparable} at all).
   *

        ElevateWord elevateWord2 =
                new ElevateWord("hoge", 2.0f, Collections.singletonList("hoge"), Collections.singletonList("content"), null, null);
        ElevateWord elevateWord3 =
                new ElevateWord("fuga", 2.0f, Collections.singletonList("fuga"), Collections.singletonList("content"), null, null);

        try {
            org.apache.maven.api.model.Model model =
                    delegate.read(reader, strict, source != null ? source.toApiSource() : null);
            return new Model(model);
        } catch (XMLStreamException e) {
            throw new XmlPullParserException(e.getMessage(), null, e);
        }
    }

    /**
     *
     * @param reader a reader object.
     * @param strict a strict object.

    try {
      assertNull(
          "remove(null) should return null or throw NullPointerException", getMap().remove(null));
    } catch (NullPointerException tolerated) {
    }
    expectUnchanged();
  }

  @MapFeature.Require({SUPPORTS_REMOVE, ALLOWS_NULL_KEY_QUERIES})
  public void testRemove_nullSupportedMissing() {
    assertNull("remove(null) should return null", getMap().remove(null));
    expectUnchanged();
  }

    webSocket.close(1000, null);
    System.out.println("onClose (" + code + "): " + reason);
  }

  @Override public void onFailure(WebSocket webSocket, Throwable t, Response response) {
    // TODO(jwilson): can I read the response body? Do I have to?
    System.out.println("onFailure " + response);
  }

  @Override public void close() throws IOException {
    if (webSocket == null) return;

    WebSocket webSocket;

     * @param dest The destination Bean. Must not be {@literal null}.
     */
    public static void copyBeanToBean(final Object src, final Object dest) {
        copyBeanToBean(src, dest, DEFAULT_OPTIONS);
    }

    /**
     * Copies properties from one Bean to another Bean.
     *
     * @param src The source Bean. Must not be {@literal null}.

  public void testToString_addValueWithNullValue() {
    String result =
        MoreObjects.toStringHelper(new TestClass())
            .addValue(null)
            .addValue("Hello")
            .addValue(null)
            .toString();
    String expected = "TestClass{null, Hello, null}";

    assertThat(result).isEqualTo(expected);
  }

  public void testToStringLenient_addValueWithNullValue() {
    String result =

                    state = 0;
                    thread = null;
                    throw new TransportException("Connection timeout");
                case 2:
                    if (te != null) { /* doConnect throw Exception */
                        state = 4; /* error */
                        thread = null;
                        throw te;
                    }