List<org.apache.maven.artifact.repository.metadata.Plugin> plugins = pluginGroupMetadata.getPlugins();

                if (plugins != null) {
                    for (org.apache.maven.artifact.repository.metadata.Plugin plugin : plugins) {
                        if (request.getPrefix().equals(plugin.getPrefix())
                                && (candidates.get(pluginGroup) == null

  <build>
    <pluginManagement>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>2.1</version>
          <configuration>
            <source>  1.5  </source>
            <target xml:space="preserve">  1.5  </target>
          </configuration>
        </plugin>
      </plugins>
    </pluginManagement>
    <plugins>

            plugins.add(newPlugin("maven-deploy-plugin", "deploy"));
        } else {
            plugins = Collections.emptySet();
        }

        return plugins;
    }

    private Plugin newPlugin(String artifactId, String... goals) {
        Plugin plugin = new Plugin();

        plugin.setGroupId("org.apache.maven.plugins");
        plugin.setArtifactId(artifactId);

        for (String goal : goals) {

        assertEquals("maven-it-plugin-a", pom.getValue("build/plugins[1]/artifactId"));
        assertEquals(1, ((List<?>) pom.getValue("build/plugins[1]/executions")).size());
        assertEquals("maven-it-plugin-b", pom.getValue("build/plugins[2]/artifactId"));
        assertEquals(1, ((List<?>) pom.getValue("build/plugins[1]/executions")).size());

  <build>
    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-from-pluginManagement-plugin</artifactId>
          <version>1.0</version>
        </plugin>
      </plugins>
    </pluginManagement>
    <plugins>
      <plugin>
        <artifactId>maven-from-plugins-plugin</artifactId>
        <version>1.0</version>
      </plugin>
    </plugins>
  </build>

  <reporting>
    <plugins>

import static eu.maveniverse.domtrip.maven.MavenPomElements.Plugins.DEFAULT_MAVEN_PLUGIN_GROUP_ID;
import static eu.maveniverse.domtrip.maven.MavenPomElements.Plugins.MAVEN_4_COMPATIBILITY_REASON;
import static eu.maveniverse.domtrip.maven.MavenPomElements.Plugins.MAVEN_PLUGIN_PREFIX;

/**
 * Strategy for upgrading Maven plugins to recommended versions.
 * Handles plugin version upgrades in build/plugins and build/pluginManagement sections.
 */
@Named

	</properties>
	<build>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>3.14.0</version>
				<configuration>
					<encoding>UTF-8</encoding>
					<release>21</release>
				</configuration>
			</plugin>
			<plugin>
				<artifactId>maven-javadoc-plugin</artifactId>
				<version>3.11.2</version>
				<configuration>

        descriptor.setVersion("0.1");
        List<String> errors = new ArrayList<>();
        mavenPluginValidator.validate(plugin, descriptor, errors);
        assertFalse(errors.isEmpty(), "Expected collection to not be empty but was empty");
    }

    @Test
    void testInvalidArtifactId() {
        Artifact plugin = new DefaultArtifact(
                "org.apache.maven.its.plugins",
                "maven-it-plugin",

     *
     * @param plugin The plugin whose descriptor should be retrieved, must not be {@code null}.
     * @param repositories The plugin repositories to use for resolving the plugin's main artifact, must not be {@code
     *            null}.
     * @param session The repository session to use for resolving the plugin's main artifact, must not be {@code null}.

     */
    @Nonnull
    Optional<Boolean> model();

    /**
     * Should upgrade plugins known to fail with Maven 4 to their minimum compatible versions.
     * This includes upgrading plugins like maven-exec-plugin, maven-enforcer-plugin,
     * flatten-maven-plugin, and maven-shade-plugin to versions that work with Maven 4.
     *