*
     * @see DependencyCollector#collect(Session, Project)
     * @see DependencyCollector#collect(Session, DependencyCoordinate)
     * @see DependencyCollector#collect(Session, Artifact)
     */
    @Nonnull
    DependencyCollectorResult collect(@Nonnull DependencyCollectorRequest request);

    /**

        return null;
    }

    private ArtifactResolutionResult collect(Set<Artifact> artifacts) throws ArtifactResolutionException {
        return collect(artifacts, null);
    }

    private ArtifactResolutionResult collect(Set<Artifact> artifacts, ArtifactFilter filter)
            throws ArtifactResolutionException {
        return artifactCollector.collect(

                        // ignore
                        e.printStackTrace();
                    }
                    List<Supplier<Object>> list =
                            res3.stream().map(this::compile).collect(Collectors.toList());
                    //noinspection unchecked
                    return () -> (Q) list(list);
                }
                if (key.getRawType() == Map.class) {

import static org.apache.maven.internal.impl.Utils.nonNull;

@Named
@Singleton
public class DefaultDependencyCollector implements DependencyCollector {

    @Nonnull
    @Override
    public DependencyCollectorResult collect(@Nonnull DependencyCollectorRequest request)
            throws DependencyCollectorException, IllegalArgumentException {
        nonNull(request, "request");

import static org.apache.maven.internal.impl.Utils.nonNull;

@Named
@Singleton
public class DefaultDependencyCollector implements DependencyCollector {

    @Nonnull
    @Override
    public DependencyCollectorResult collect(@Nonnull DependencyCollectorRequest request)
            throws DependencyCollectorException, IllegalArgumentException {
        nonNull(request, "request");

    /**
     * Shortcut for {@code getService(DependencyCollector.class).collect(...)}
     *
     * @param artifact artifact for which to get the dependencies, including transitive ones
     * @return root node of the dependency graph for the given artifact
     *
     * @see org.apache.maven.api.services.DependencyCollector#collect(Session, Artifact)

                .peek(l -> Objects.requireNonNull(l.getId(), "A lifecycle must have an id."))
                .sorted(Comparator.comparing(Lifecycle::getId, comparator))
                .collect(Collectors.toList());
    }

    private Map<String, Lifecycle> lookupLifecycles() {
        // TODO: Remove the following code when maven-compat is gone

    }

    /**
     * Unravels trace tree (going upwards from current node), looking for {@link CollectStepData} trace data.
     * This method may return {@code null} if no collect step data found in passed trace data or it's parents.
     * <p>
     * Visible for testing.
     */
    static CollectStepData lookupCollectStepData(RequestTrace trace) {
        CollectStepData collectStepTrace = null;

  <version>1.0-SNAPSHOT</version>

  <name>Maven Integration Test :: MNG-3760</name>
  <description>
    Test interpolation of ${project.baseUri}
  </description>

  <properties>
    <!-- this is where we collect all the interpolated values for the POM dump -->
    <prop1>${project.baseUri}</prop1>
  </properties>

  <name>Maven Integration Test :: MNG-3944</name>
  <description>
    Test that interpolation of ${basedir} works for a POM that is not named "pom.xml"
  </description>

  <properties>
    <!-- this is where we collect all the interpolated values for the POM dump -->
    <prop0>${basedir}</prop0>
    <prop1>${project.basedir}</prop1>
  </properties>