</mailingList>
  </mailingLists>

  <developers>
    <developer>
      <id>jvanzyl</id>
      <name>Jason van Zyl</name>
      <email>******@****.***</email>
      <organization>ASF</organization>
      <roles>
        <role>PMC Chair</role>
      </roles>
      <timezone>-5</timezone>
    </developer>
    <developer>
      <id>brett</id>
      <name>Brett Porter</name>
      <email>******@****.***</email>

    /**
     * Obtain the {@link Type} from the specified {@code id}.
     * <p>
     * Shortcut for {@code getService(TypeRegistry.class).require(...)}.
     *
     * @see org.apache.maven.api.services.TypeRegistry#require(String)
     */
    @Nonnull
    Type requireType(@Nonnull String id);

    /**
     * Obtain the {@link Language} from the specified {@code id}.
     * <p>

     * <syntax>project.distributionManagementArtifactRepository</syntax>
     * <origin><![CDATA[
     * <distributionManagement>
     * <repository>
     * <id>some-repo</id>
     * <url>scp://host/path</url>
     * </repository>
     * <snapshotRepository>
     * <id>some-snap-repo</id>
     * <url>scp://host/snapshot-path</url>
     * </snapshotRepository>
     * </distributionManagement>
     * ]]></origin>
     * <usage><![CDATA[

import javax.inject.Named;
import javax.inject.Singleton;

/**
 * {@code default} lifecycle provider.
 */
@Named(DefaultLifecycleProvider.LIFECYCLE_ID)
@Singleton
public final class DefaultLifecycleProvider extends AbstractLifecycleProvider {
    static final String LIFECYCLE_ID = "default";

    // START SNIPPET: default
    private static final String[] PHASES = {
        "validate",
        "initialize",

        </configuration>
        <executions>
          <execution>
            <id>site-docs</id>
            <phase>pre-site</phase>
            <goals>
              <goal>xdoc</goal>
              <goal>xsd</goal>
            </goals>
          </execution>
          <execution>
            <id>standard</id>
            <goals>
              <goal>java</goal>
              <goal>xpp3-reader</goal>

                            Stream.of(builtinValues), providers.stream().flatMap(p -> p.provides().stream()))
                    .collect(Collectors.toMap(t -> t.id(), t -> t));
        }

        @Override
        public Optional<T> lookup(String id) {
            return Optional.ofNullable(values.get(id));
        }
    }

    </mailingList>
  </mailingLists>
  <developers>
    <developer>
      <id>jvanzyl</id>
      <name>Jason van Zyl</name>
      <email>******@****.***</email>
      <organization>ASF</organization>
      <roles>
        <role>PMC Chair</role>
      </roles>
      <timezone>-5</timezone>
    </developer>
    <developer>
      <id>brett</id>
      <name>Brett Porter</name>
      <email>******@****.***</email>

                "'profiles.profile[pro].repositories.repository.id' must be unique"
                        + " but found duplicate repository with id test");
    }

    @Test
    void testValidateUniqueProxyId() throws Exception {
        Settings settings = new Settings();
        Proxy proxy = new Proxy();
        String id = "foo";
        proxy.setId(id);
        proxy.setHost("www.example.com");

<project>
  <modelVersion>4.0.0</modelVersion>
  <groupId>maven-test</groupId>
  <artifactId>maven-test-a</artifactId>
  <packaging>jar</packaging>
  <version>1.1</version>
  <repositories>
    <repository>
      <id>central</id>
      <name>Fake Maven Central Repository</name>
      <url>file://dummy</url>
    </repository>
  </repositories>

        <version>2.1-SNAPSHOT</version>
        <executions>
          <execution>
            <!-- NOTE: Explicitly reference "default" id here -->
            <id>default</id>
            <phase>child-default</phase>
          </execution>
          <execution>
            <id>non-default</id>
            <phase>child-non-default</phase>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>