private final Artifact artifact;

    ArtifactClassRealmConstituent(Artifact artifact) {
        this.artifact = artifact;
    }

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

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

    @Override
    public String getType() {

        return (extension ? "extension>" : "plugin>") + plugin.getGroupId() + ":" + plugin.getArtifactId() + ":"
                + version;
    }

    private static String getId(Artifact artifact) {
        return getId(
                artifact.getGroupId(),
                artifact.getArtifactId(),
                artifact.getExtension(),

        return getGroupId()
                + ':'
                + getArtifactId()
                + ':'
                + getExtension()
                + (c.isEmpty() ? "" : ":" + c)
                + ':'
                + getVersion();
    }

    /**
     * {@return the group identifier of the artifact}.
     *
     * @see ArtifactCoordinates#getGroupId()
     */
    @Nonnull

    }

    @Override
    public void configure(MavenProject project, MojoExecution mojoExecution, boolean allowPluginLevelConfig) {
        String g = mojoExecution.getPlugin().getGroupId();

        String a = mojoExecution.getPlugin().getArtifactId();

        Plugin plugin = findPlugin(g, a, project.getBuildPlugins());

        if (plugin == null && project.getPluginManagement() != null) {

                .map(Dependency::getArtifact)
                .filter(d -> "org.apache.maven".equals(d.getGroupId()))
                .filter(d -> !DefaultPluginValidationManager.EXPECTED_PROVIDED_SCOPE_EXCLUSIONS_GA.contains(
                        d.getGroupId() + ":" + d.getArtifactId()))
                .map(Artifact::getVersion)
                .collect(Collectors.toSet());

    public PluginNotFoundException(Plugin plugin, ArtifactNotFoundException e) {
        super(
                "Plugin could not be found - check that the goal name is correct: " + e.getMessage(),
                e.getGroupId(),
                e.getArtifactId(),
                e.getVersion(),
                "maven-plugin",
                null,
                e.getRemoteRepositories(),
                null,

                return step.name + "(" + step.project.getGroupId() + ":" + artifactId + ")";
            } else {
                return step.name + "(:" + artifactId + ")";
            }
        }
    }

    protected void mojo(Consumer<String> writer, MojoExecution mojoExecution) {
        String mojoExecId =
                mojoExecution.getGroupId() + ':' + mojoExecution.getArtifactId() + ':' + mojoExecution.getVersion()

        buffer.append(" {execution: ").append(executionId).append('}');
        return buffer.toString();
    }

    public String getGroupId() {
        if (mojoDescriptor != null) {
            return mojoDescriptor.getPluginDescriptor().getGroupId();
        }

        return plugin.getGroupId();
    }

    public String getArtifactId() {
        if (mojoDescriptor != null) {

    }

    protected static Metadata createMetadata(Artifact artifact, Versioning versioning) {
        Metadata metadata = new Metadata();
        metadata.setGroupId(artifact.getGroupId());
        metadata.setArtifactId(artifact.getArtifactId());
        metadata.setVersion(artifact.getVersion());
        metadata.setVersioning(versioning);
        return metadata;
    }

    /**
     * Gets the effective group identifier of the model.
     *
     * @return The effective group identifier of the model or an empty string if unknown, never {@code null}.
     */
    public String getGroupId() {
        return (groupId != null) ? groupId : "";
    }

    /**
     * Sets the effective group identifier of the model.
     *