this.project = project;
        pluginGroupId = plugin.getGroupId();
        pluginArtifactId = plugin.getArtifactId();
        pluginVersion = plugin.getVersion();
    }

    public PluginManagerException(Plugin plugin, String message, Throwable cause) {
        super(message, cause);

        pluginGroupId = plugin.getGroupId();
        pluginArtifactId = plugin.getArtifactId();

        return artifact.getGroupId() + ':' + artifact.getArtifactId() + ':' + artifact.getBaseVersion();
    }

    protected String getKey(String classifier, String extension) {
        return classifier + ':' + extension;
    }

    @Override
    public String getGroupId() {
        return metadata.getGroupId();
    }

    @Override
    public String getArtifactId() {

        return session;
    }

    public MavenProject getProject() {
        return project;
    }

    @Nonnull
    @Override
    public String getGroupId() {
        return project.getGroupId();
    }

    @Nonnull
    @Override
    public String getArtifactId() {
        return project.getArtifactId();
    }

    @Nonnull
    @Override

            metadata = metadata.withPlugins(new ArrayList<>(recessive.getPlugins()));
        }
    }

    public Object getKey() {
        return getGroupId() + ':' + getArtifactId();
    }

    public static Object getKey(Artifact artifact) {
        return artifact.getGroupId() + ':' + artifact.getArtifactId();
    }

    @Deprecated
    @Override
    public MavenMetadata setFile(File file) {

        return Objects.equals(this.getGroupId(), that.getGroupId())
                && Objects.equals(this.getArtifactId(), that.getArtifactId())
                && Objects.equals(this.getVersion(), that.getVersion())
                && Objects.equals(this.getClassifier(), that.getClassifier());
    }

    @Override
    public int hashCode() {
        return Objects.hash(getGroupId(), getArtifactId(), getVersion(), getClassifier());

        return Objects.equals(this.getGroupId(), that.getGroupId())
                && Objects.equals(this.getArtifactId(), that.getArtifactId())
                && Objects.equals(this.getVersion(), that.getVersion())
                && Objects.equals(this.getClassifier(), that.getClassifier());
    }

    @Override
    public int hashCode() {
        return Objects.hash(getGroupId(), getArtifactId(), getVersion(), getClassifier());

        return new LocalSnapshotMetadata(metadata, path, timestamp);
    }

    public Object getKey() {
        return getGroupId() + ':' + getArtifactId() + ':' + getVersion();
    }

    public static Object getKey(Artifact artifact) {
        return artifact.getGroupId() + ':' + artifact.getArtifactId() + ':' + artifact.getBaseVersion();
    }

    @Override
    protected void merge(Metadata recessive) {

        }
        return stringBuilder.toString();
    }

    private boolean equals(Dependency d1, Dependency d2) {
        return Objects.equals(d1.getGroupId(), d2.getGroupId())
                && Objects.equals(d1.getArtifactId(), d2.getArtifactId())
                && Objects.equals(d1.getVersion(), d2.getVersion())
                && Objects.equals(d1.getType(), d2.getType())

        return artifact;
    }

    @Override
    public String key() {
        return key;
    }

    @Nonnull
    @Override
    public String getGroupId() {
        return artifact.getGroupId();
    }

    @Nonnull
    @Override
    public String getArtifactId() {
        return artifact.getArtifactId();
    }

    @Nonnull
    @Override

    @Override
    public void validate(Artifact pluginArtifact, PluginDescriptor pluginDescriptor, List<String> errors) {
        if (!pluginArtifact.getGroupId().equals(pluginDescriptor.getGroupId())) {
            errors.add("Plugin's descriptor contains the wrong group ID: " + pluginDescriptor.getGroupId());
        }

        if (!pluginArtifact.getArtifactId().equals(pluginDescriptor.getArtifactId())) {