}
    return comparator;
  }

  @Override
  public boolean containsKey(Object key) {
    try {
      return delegate.containsKey(checkValid(key));
    } catch (NullPointerException | ClassCastException e) {
      return false;
    }
  }

  @Override
  public boolean containsValue(Object value) {
    return delegate.containsValue(value);
  }

  @Override

                @Override
                public boolean remove(Object o) {
                  return map.entrySet().remove(o);
                }

                @Override
                public boolean containsAll(Collection<?> c) {
                  return map.entrySet().containsAll(c);
                }

                @Override
                public boolean removeAll(Collection<?> c) {

    // TODO let the scope handler deal with this
    private static boolean isCompilePathElement(final String scope) {
        return Artifact.SCOPE_COMPILE.equals(scope)
                || Artifact.SCOPE_PROVIDED.equals(scope)
                || Artifact.SCOPE_SYSTEM.equals(scope);
    }

    // TODO let the scope handler deal with this
    private static boolean isRuntimePathElement(final String scope) {

  private static class UnmovableFile extends File {

    private final boolean canRename;
    private final boolean canDelete;

    UnmovableFile(File file, boolean canRename, boolean canDelete) {
      super(file.getPath());
      this.canRename = canRename;
      this.canDelete = canDelete;
    }

    @Override
    public boolean renameTo(File to) {
      return canRename && super.renameTo(to);
    }

    return NaNLinearTransformation.INSTANCE;
  }

  /** Returns whether this is a vertical transformation. */
  public abstract boolean isVertical();

  /** Returns whether this is a horizontal transformation. */
  public abstract boolean isHorizontal();

  /**
   * Returns the slope of the transformation, i.e. the rate of change of {@code y} with respect to

        void shouldDeterminePluginEnablementBasedOnOptions(
                Boolean all, Boolean plugins, String model, boolean expectedEnabled, String description) {
            UpgradeContext context =
                    createMockContext(tempDir, TestUtils.createOptions(all, null, null, plugins, model));

            boolean isEnabled = upgradeGoal.testIsPluginsEnabled(context);

    }

    @Override
    public Model read(Reader reader, boolean strict, InputSource source) throws IOException, XmlPullParserException {
        return super.read(reader, strict, source);
    }

    @Override
    public Model read(Reader reader, boolean strict) throws IOException, XmlPullParserException {
        return super.read(reader, strict);
    }

    @Override

    }

    @Override
    public boolean isDebugEnabled() {
        return logger.isDebugEnabled();
    }

    @Override
    public boolean isInfoEnabled() {
        return logger.isInfoEnabled();
    }

    @Override
    public boolean isWarnEnabled() {
        return logger.isWarnEnabled();
    }

    @Override
    public boolean isErrorEnabled() {

    assertThat(primitives)
        .containsExactly(
            boolean.class,
            byte.class,
            char.class,
            double.class,
            float.class,
            int.class,
            long.class,
            short.class,
            void.class);

    assertThrows(UnsupportedOperationException.class, () -> primitives.remove(boolean.class));
  }

  public void testAllWrapperTypes() {

    return Maps.valueIterator(multimap.entries().iterator());
  }

  @Override
  public boolean contains(@Nullable Object o) {
    return multimap.containsValue(o);
  }

  @Override
  public int size() {
    return multimap.size();
  }

  @Override
  public boolean remove(@Nullable Object o) {
    Predicate<? super Entry<K, V>> entryPredicate = multimap.entryPredicate();