relocation.global ? "User global relocation" : "User project relocation");
                LOGGER.debug(
                        "The artifact {} has been relocated to {}: {}",
                        original,
                        result,
                        relocation.global ? "User global relocation" : "User project relocation");
                return result;
            }

        PersistedToolchains global = readToolchains(globalSource, request, problems);

        Source userSource = request.getUserToolchainsSource().orElse(null);
        PersistedToolchains user = readToolchains(userSource, request, problems);

        PersistedToolchains effective = toolchainsMerger.merge(user, global, false, null);

        if (hasErrors(problems)) {

/**
 *
 * @since 4.0.0
 */
@Experimental
public interface ToolchainsBuilderRequest {
    @Nonnull
    Session getSession();

    /**
     * Gets the global Toolchains source.
     *
     * @return the global Toolchains source or {@code null} if none
     */
    @Nonnull
    Optional<Source> getGlobalToolchainsSource();

    /**
     * Gets the user Toolchains source.
     *

        return Plugin.newBuilder()
                .groupId("org.apache.maven.plugins")
                .artifactId(artifactId)
                .executions(Arrays.stream(goals)
                        .map(goal -> PluginExecution.newBuilder()
                                .id("default-" + goal)
                                .goals(List.of(goal))

          <artifactId>modello-maven-plugin</artifactId>
          <executions>
            <execution>
              <id>modello-site-docs</id>
              <goals>
                <goal>xdoc</goal>
                <goal>xsd</goal>
              </goals>
              <phase>none</phase>
            </execution>
          </executions>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>

          </models>
        </configuration>
        <executions>
          <execution>
            <id>modello</id>
            <goals>
              <goal>java</goal>
              <goal>xpp3-reader</goal>
              <goal>xpp3-writer</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;
import org.apache.maven.api.settings.Settings;

/**
 * Builds the effective settings from a user settings file and/or a global settings file.
 *
 * @since 4.0.0
 */
@Experimental
public interface SettingsBuilder extends Service {

    /**
     * Builds the effective settings of the specified settings files.
     *

        <groupId>org.codehaus.modello</groupId>
        <artifactId>modello-maven-plugin</artifactId>
        <executions>
          <execution>
            <id>plugin</id>
            <goals>
              <goal>velocity</goal>
            </goals>
            <phase>generate-sources</phase>
            <configuration>
              <velocityBasedir>${project.basedir}/../../src/mdo</velocityBasedir>
              <version>2.0.0</version>

        <groupId>org.codehaus.modello</groupId>
        <artifactId>modello-maven-plugin</artifactId>
        <executions>
          <execution>
            <id>velocity</id>
            <goals>
              <goal>velocity</goal>
            </goals>
            <configuration>
              <version>1.2.0</version>
              <velocityBasedir>${project.basedir}/../../src/mdo</velocityBasedir>
              <models>

        }

        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) {
            PluginExecution pluginExecution = new PluginExecution();
            pluginExecution.setId("default-" + goal);