this.original = checkNotNull(original);
    }

    @Override
    public boolean matches(char c) {
      return !original.matches(c);
    }

    @Override
    public boolean matchesAllOf(CharSequence sequence) {
      return original.matchesNoneOf(sequence);
    }

    @Override
    public boolean matchesNoneOf(CharSequence sequence) {
      return original.matchesAllOf(sequence);
    }

   *
   * <p>This method delegates to the appropriate methods of {@link NavigableSet} (namely {@link
   * NavigableSet#subSet(Object, boolean, Object, boolean) subSet()}, {@link
   * NavigableSet#tailSet(Object, boolean) tailSet()}, and {@link NavigableSet#headSet(Object,
   * boolean) headSet()}) to actually construct the view. Consult these methods for a full
   * description of the returned view's behavior.
   *

      return MapMakerInternalMap.this.size();
    }

    @Override
    public boolean isEmpty() {
      return MapMakerInternalMap.this.isEmpty();
    }

    @Override
    public boolean contains(Object o) {
      return MapMakerInternalMap.this.containsKey(o);
    }

    @Override
    public boolean remove(Object o) {
      return MapMakerInternalMap.this.remove(o) != null;
    }

  /**
   * Ensures the truth of an expression involving one or more parameters to the calling method.
   *
   * @param expression a boolean expression
   * @throws IllegalArgumentException if {@code expression} is false
   */
  public static void checkArgument(boolean expression) {
    if (!expression) {
      throw new IllegalArgumentException();
    }
  }

  /**

        }
    }

    default boolean getSystemPropertyAsBoolean(final String key, final boolean defaultValue) {
        return Constants.TRUE.equalsIgnoreCase(getSystemProperty(key, defaultValue ? Constants.TRUE : Constants.FALSE));
    }

    default void setSystemPropertyAsBoolean(final String key, final boolean value) {
        setSystemProperty(key, value ? Constants.TRUE : Constants.FALSE);

        }
    }

    public Result<? extends Model> buildRawModel(Path pomFile, int validationLevel, boolean locationTracking) {
        return buildRawModel(pomFile, validationLevel, locationTracking, null);
    }

    public Result<? extends Model> buildRawModel(
            Path pomFile, int validationLevel, boolean locationTracking, ModelTransformerContext context) {

    // 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) {

      }
    }

    @Override
    public boolean contains(@CheckForNull Object o) {
      synchronized (mutex) {
        return delegate().contains(o);
      }
    }

    @Override
    public boolean containsAll(Collection<?> c) {
      synchronized (mutex) {
        return delegate().containsAll(c);
      }
    }

    @Override
    public boolean isEmpty() {
      synchronized (mutex) {

        assertEquals(Boolean.TRUE, pom.getValue("ciManagement/notifiers[1]/sendOnError"));
        assertEquals(Boolean.FALSE, pom.getValue("ciManagement/notifiers[1]/sendOnFailure"));
        assertEquals(Boolean.FALSE, pom.getValue("ciManagement/notifiers[1]/sendOnWarning"));
        assertEquals(Boolean.FALSE, pom.getValue("ciManagement/notifiers[1]/sendOnSuccess"));

  static final boolean GENERATE_CANCELLATION_CAUSES;

  static {
    // System.getProperty may throw if the security policy does not permit access.
    boolean generateCancellationCauses;
    try {
      generateCancellationCauses =
          Boolean.parseBoolean(
              System.getProperty("guava.concurrent.generate_cancellation_cause", "false"));