return missingArtifacts != null && !missingArtifacts.isEmpty();
    }

    public List<Artifact> getMissingArtifacts() {
        return missingArtifacts == null ? Collections.emptyList() : Collections.unmodifiableList(missingArtifacts);
    }

    public MetadataResolutionResult addMissingArtifact(Artifact artifact) {
        missingArtifacts = initList(missingArtifacts);

        missingArtifacts.add(artifact);

        return missingArtifacts != null && !missingArtifacts.isEmpty();
    }

    public List<Artifact> getMissingArtifacts() {
        return missingArtifacts == null ? Collections.emptyList() : Collections.unmodifiableList(missingArtifacts);
    }

    public ArtifactResolutionResult addMissingArtifact(Artifact artifact) {
        missingArtifacts = initList(missingArtifacts);

        missingArtifacts.add(artifact);

 *
 * <p>For example, to test {@link java.util.Collections#unmodifiableList(java.util.List)
 * Collections.unmodifiableList}'s iterator:
 *
 * {@snippet :
 * List<String> expectedElements =
 *     Arrays.asList("a", "b", "c", "d", "e");
 * List<String> actualElements =
 *     Collections.unmodifiableList(
 *         Arrays.asList("a", "b", "c", "d", "e"));
 * IteratorTester<String> iteratorTester =

 * the License.
 */

package com.google.common.util.concurrent;

import static com.google.common.collect.Lists.newArrayListWithCapacity;
import static java.util.Collections.unmodifiableList;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.Lists;
import com.google.errorprone.annotations.concurrent.LazyInit;

 *
 * <p>For example, to test {@link java.util.Collections#unmodifiableList(java.util.List)
 * Collections.unmodifiableList}'s iterator:
 *
 * {@snippet :
 * List<String> expectedElements =
 *     Arrays.asList("a", "b", "c", "d", "e");
 * List<String> actualElements =
 *     Collections.unmodifiableList(
 *         Arrays.asList("a", "b", "c", "d", "e"));
 * IteratorTester<String> iteratorTester =

     * @deprecated Use {@link #getRequiredActiveProfileIds()} and {@link #getOptionalActiveProfileIds()} instead.
     */
    @Deprecated
    public List<String> getActiveProfiles() {
        return Collections.unmodifiableList(new ArrayList<>(getProfileIds(pa -> pa.active())));
    }

    /**
     * Mimics the pre-Maven 4 "inactive profiles" list.

        return pluginGroups;
    }

    @Override
    public DefaultPluginPrefixRequest setPluginGroups(List<String> pluginGroups) {
        if (pluginGroups != null) {
            this.pluginGroups = Collections.unmodifiableList(pluginGroups);
        } else {
            this.pluginGroups = Collections.emptyList();
        }

        return this;
    }

    @Override
    public Model getPom() {
        return pom;

     */
    private final List<ProjectActivationSettings> activations = new ArrayList<>();

    public List<ProjectActivationSettings> getActivations() {
        return Collections.unmodifiableList(activations);
    }

    /**
     * Adds a project activation to the request.
     * @param selector The selector of the project.
     * @param active Should the project be activated?

  private static final List<Integer> OVERREPORTING_SIZE_LIST;

  static {
    List<Integer> collection123 = Arrays.asList(1, 2, 3);
    UNDERREPORTING_SIZE_LIST = unmodifiableList(new MisleadingSizeList<>(collection123, -1));
    OVERREPORTING_SIZE_LIST = unmodifiableList(new MisleadingSizeList<>(collection123, 1));
  }

  /*
   * c.g.c.collect.testing.Helpers.misleadingSizeList has a broken Iterator, so we can't use it. (I

        }

        return Collections.unmodifiableList(new ArrayList<>(versions));
    }

    public void setReaders(Collection<WorkspaceReader> readers) {
        requireNonNull(readers, "readers");
        // skip possible null entries
        this.readers = Collections.unmodifiableList(