<!-- tag::getproperty[] -->
<property name="antProp" value="a property defined in an Ant build"/>
<!-- end::getproperty[] -->

<!-- tag::setreference[] -->
<path refid="classpath"/>
<!-- end::setreference[] -->

<!-- tag::getreference[] -->
<path id="antPath" location="libs"/>
<!-- end::getreference[] -->

<!-- tag::getproperty[] -->
<property name="antProp" value="a property defined in an Ant build"/>
<!-- end::getproperty[] -->

<!-- tag::setreference[] -->
<path refid="classpath"/>
<!-- end::setreference[] -->

<!-- tag::getreference[] -->
<path id="antPath" location="libs"/>
<!-- end::getreference[] -->

    N node = super.removeInEdge(edge, isSelfLoop);
    Multiset<N> predecessors = getReference(predecessorsReference);
    if (predecessors != null) {
      checkState(predecessors.remove(node));
    }
    return node;
  }

  @Override
  public N removeOutEdge(E edge) {
    N node = super.removeOutEdge(edge);
    Multiset<N> successors = getReference(successorsReference);
    if (successors != null) {

    N node = super.removeInEdge(edge, isSelfLoop);
    Multiset<N> predecessors = getReference(predecessorsReference);
    if (predecessors != null) {
      checkState(predecessors.remove(node));
    }
    return node;
  }

  @Override
  public N removeOutEdge(E edge) {
    N node = super.removeOutEdge(edge);
    Multiset<N> successors = getReference(successorsReference);
    if (successors != null) {

  @Override
  public void addOutEdge(E edge, N node) {
    super.addOutEdge(edge, node);
    Multiset<N> adjacentNodes = getReference(adjacentNodesReference);
    if (adjacentNodes != null) {
      checkState(adjacentNodes.add(node));
    }
  }

  @CheckForNull
  private static <T> T getReference(@CheckForNull Reference<T> reference) {
    return (reference == null) ? null : reference.get();
  }

        } else {
            throw new InvalidModelRuleException(referrer, new ModelRuleBindingException(
                IncompatibleTypeReferenceReporter.of(node, predicate.getReference().getType(), predicate.getReference().getDescription(), writable).asString()
            ));
        }
    }

  @Override
  public void addOutEdge(E edge, N node) {
    super.addOutEdge(edge, node);
    Multiset<N> adjacentNodes = getReference(adjacentNodesReference);
    if (adjacentNodes != null) {
      checkState(adjacentNodes.add(node));
    }
  }

  @CheckForNull
  private static <T> T getReference(@CheckForNull Reference<T> reference) {
    return (reference == null) ? null : reference.get();
  }

        String expectedReference = "http://cwiki.apache.org/confluence/display/MAVEN/ConnectException";
        assertEquals(expectedReference, exceptionSummary.getReference());
    }

    @Test
    void testHandleExceptionAetherClassNotFound() {
        Throwable cause2 = new NoClassDefFoundError("org/sonatype/aether/RepositorySystem");
        Plugin plugin = new Plugin();

                    reference = getReference(dejaVu, cause);
                }

                if (reference == null || reference.isEmpty()) {
                    reference = exception.getClass().getSimpleName();
                }
            } else if (exception instanceof LifecycleExecutionException) {
                reference = getReference(dejaVu, exception.getCause());

    private final ModelReference<?> reference;

    public BindingPredicate(ModelReference<?> reference) {
        this.reference = reference;
    }

    public ModelReference<?> getReference() {
        return reference;
    }

    @Override
    public String toString() {
        ModelType<?> type = reference.getType();