*
 * @since 4.0.0
 */
@Experimental
@Immutable
public interface Artifact {

    /**
     * Returns a unique identifier for this artifact.
     * The identifier is composed of groupId, artifactId, extension, classifier, and version.
     *
     * @return the unique identifier
     */
    @Nonnull
    default String key() {
        return getGroupId()
                + ':'
                + getArtifactId()

BasicLit    = int_lit | float_lit | imaginary_lit | rune_lit | string_lit .
OperandName = identifier | QualifiedIdent .
</pre>

<h3 id="Qualified_identifiers">Qualified identifiers</h3>

<p>
A qualified identifier is an identifier qualified with a package name prefix.
Both the package name and the identifier must not be
<a href="#Blank_identifier">blank</a>.
</p>

<pre class="ebnf">

          <defaultValue></defaultValue>
          <identifier>true</identifier>
        </field>
        <field>
          <name>extension</name>
          <version>1.1.0+</version>
          <type>String</type>
          <description>The file extension of the sub-artifact. Each classifier and extension pair may only appear once.</description>
          <identifier>true</identifier>
        </field>
        <field xml.tagName="value">

     *
     * @param lifecycleId The identifier of the lifecycle that could not be located, may be {@code null}.
     */
    public LifecycleNotFoundException(String lifecycleId) {
        super("Unknown lifecycle " + lifecycleId);
        this.lifecycleId = (lifecycleId != null) ? lifecycleId : "";
    }

    /**
     * Gets the identifier of the lifecycle that was not found.
     *

    /**
     * Shortcut for {@code getService(ArtifactFactory.class).create(...)}.
     *
     * @param groupId the group identifier, or {@code null} is unspecified
     * @param artifactId the artifact identifier, or {@code null} is unspecified
     * @param version the artifact version, or {@code null} is unspecified
     * @param extension the artifact extension, or {@code null} is unspecified

		VersionInfo: "1.1",
		TypeUrl:     clientConfigType,
		Resources:   resources,
		ControlPlane: &core.ControlPlane{
			Identifier: string(identifier),
		},
	}

@Experimental
@Immutable
public interface Repository {

    /**
     * The reserved id for Maven Central
     */
    String CENTRAL_ID = "central";

    /**
     * Gets the identifier of this repository.
     *
     * @return the (case-sensitive) identifier, never {@code null}
     */
    @Nonnull
    String getId();

    /**
     * Gets the type of the repository, for example "default".
     *

      <description>Definition of a toolchain instance.</description>
      <fields>
        <field>
          <name>type</name>
          <version>1.0.0+</version>
          <!-- <identifier>true</identifier> -->
          <description>
            Type of toolchain:&lt;ul>
            &lt;li>{@code jdk} for &lt;a

    String CLEAN = "clean";

    String DEFAULT = "default";

    String SITE = "site";

    String WRAPPER = "wrapper";

    /**
     * Name or identifier of this lifecycle.
     *
     * @return the unique identifier for this lifecycle
     */
    @Override
    String id();

    /**
     * Collection of phases for this lifecycle
     */
    Collection<Phase> phases();

    /**

 */
record ModelData(ModelSource source, Model model) {

    /**
     * Gets unique identifier of the model
     *
     * @return The effective identifier of the model, never {@code null}.
     */
    public String id() {
        // if source is null, it is the super model, which can be accessed via empty string