static Lifecycle.Phase phase(String name) {
        return new DefaultPhase(name, Collections.emptyList(), Collections.emptyList(), Collections.emptyList());
    }

    static Lifecycle.Phase phase(String name, Lifecycle.Phase... phases) {
        return new DefaultPhase(name, Collections.emptyList(), Collections.emptyList(), asList(phases));
    }

        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);

        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);

import static com.google.common.collect.testing.IteratorFeature.MODIFIABLE;
import static com.google.common.collect.testing.IteratorFeature.UNMODIFIABLE;
import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;
import static java.util.Collections.unmodifiableList;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;

    assertThrows(IllegalArgumentException.class, () -> Iterables.limit(list, -1));
  }

  public void testIsEmpty() {
    Iterable<String> emptyList = emptyList();
    assertTrue(Iterables.isEmpty(emptyList));

    Iterable<String> singletonList = singletonList("foo");
    assertFalse(Iterables.isEmpty(singletonList));
  }

  public void testSkip_simple() {

 */

package com.google.common.collect;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkPositionIndex;
import static java.util.Collections.emptyList;
import static java.util.Collections.emptySet;

import com.google.common.annotations.GwtCompatible;
import com.google.common.base.Predicate;
import com.google.errorprone.annotations.CanIgnoreReturnValue;

import org.apache.maven.project.MavenProject;

public class DefaultMavenExecutionResult implements MavenExecutionResult {
    private MavenProject project;

    private List<MavenProject> topologicallySortedProjects = Collections.emptyList();

    private DependencyResolutionResult dependencyResolutionResult;

    private final List<Throwable> exceptions = new CopyOnWriteArrayList<>();

                .build();
    }

    @NotThreadSafe
    class ArtifactInstallerRequestBuilder {
        Session session;
        Collection<ProducedArtifact> artifacts = Collections.emptyList();

        ArtifactInstallerRequestBuilder() {}

        @Nonnull
        public ArtifactInstallerRequestBuilder session(@Nonnull Session session) {
            this.session = session;
            return this;

import static com.google.common.collect.testing.IteratorFeature.MODIFIABLE;
import static com.google.common.collect.testing.IteratorFeature.UNMODIFIABLE;
import static java.util.Collections.emptyList;
import static java.util.Collections.singletonList;
import static java.util.Collections.unmodifiableList;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;

        return new ResolutionNode(Artifact, Collections.<ArtifactRepository>emptyList());
    }

    protected ResolutionNode createResolutionNode(Artifact Artifact, ResolutionNode parent) {
        return new ResolutionNode(Artifact, Collections.<ArtifactRepository>emptyList(), parent);
    }