// is not a bug but a performance optimization.
        if (capabilities.isEmpty() && (component.hasMoreThanOneSelectedNodeUsingVariantAwareResolution() || capabilitiesConflictHandler.hasSeenCapability(component.getImplicitCapability()))) {
            action.execute(component.getImplicitCapability());
        } else {
            // The isEmpty check is not required, might look innocent, but Guava's performance bad for an empty immutable list

            // The file pom may not contain the modelVersion yet, as it may be set later by the
            // ModelVersionXMLFilter.
            if (m.getModelVersion() != null && !m.getModelVersion().isEmpty()) {
                validateModelVersion(problems, m.getModelVersion(), m, VALID_MODEL_VERSIONS);
            }

            validateStringNoExpression("groupId", problems, Severity.WARNING, Version.V20, m.getGroupId(), m);

                profileSelector.getActiveProfiles(request.getProfiles(), profileActivationContext, problems);

        result.setActiveExternalProfiles(activeExternalProfiles);

        if (!activeExternalProfiles.isEmpty()) {
            Properties profileProps = new Properties();
            for (Profile profile : activeExternalProfiles) {
                profileProps.putAll(profile.getProperties());
            }

            // The file pom may not contain the modelVersion yet, as it may be set later by the
            // ModelVersionXMLFilter.
            if (m.getModelVersion() != null && !m.getModelVersion().isEmpty()) {
                validateModelVersion(problems, m.getModelVersion(), m, VALID_MODEL_VERSIONS);
            }

            validateStringNoExpression("groupId", problems, Severity.WARNING, Version.V20, m.getGroupId(), m);

            operations.add(InternalBuildProgressListener.TEST_OUTPUT);
        }
        if (!fileDownloadListeners.isEmpty()) {
            operations.add(InternalBuildProgressListener.FILE_DOWNLOAD);
        }
        if (!buildPhaseListeners.isEmpty()) {
            operations.add(InternalBuildProgressListener.BUILD_PHASE);
        }
        if (!problemListeners.isEmpty()) {

                            .getRepository();
                    if (r.getId() != null
                            && !r.getId().isEmpty()
                            && r.getUrl() != null
                            && !r.getUrl().isEmpty()) {
                        ArtifactRepository repo = MavenRepositorySystem.buildArtifactRepository(

                profileSelector.getActiveProfiles(request.getProfiles(), profileActivationContext, problems);

        result.setActiveExternalProfiles(activeExternalProfiles);

        if (!activeExternalProfiles.isEmpty()) {
            Properties profileProps = new Properties();
            for (Profile profile : activeExternalProfiles) {
                profileProps.putAll(profile.getProperties());
            }

            }
        }
    }

    private boolean hasRelevantFields(ClassDetails type) {
        List<Field> instanceFields = type.getInstanceFields();
        if (instanceFields.isEmpty()) {
            return false;
        }
        // Ignore irrelevant synthetic metaClass field injected by the Groovy compiler
        if (instanceFields.size() == 1 && isSyntheticMetaClassField(instanceFields.get(0))) {

        warnOnInvalidInternalAPIUsage("contains(File)", ProperMethodUsage.RESOLVABLE);
        return getIntrinsicFiles().contains(file);
    }

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

    @Override
    @Deprecated
    public Set<File> files(Dependency... dependencies) {
        Set<Dependency> deps = WrapUtil.toLinkedSet(dependencies);

        for (E e : set2) {
          if (!set1.contains(e)) {
            size++;
          }
        }
        return size;
      }

      @Override
      public boolean isEmpty() {
        return set1.isEmpty() && set2.isEmpty();
      }

      @Override
      public UnmodifiableIterator<E> iterator() {
        return new AbstractIterator<E>() {
          final Iterator<? extends E> itr1 = set1.iterator();