usedTypes.clear();
            }
        }
    }

    @Override
    public Optional<Type> lookup(String id) {
        return Optional.of(require(id));
    }

    @Override
    @Nonnull
    public Type require(String id) {
        nonNull(id, "id");
        return usedTypes.computeIfAbsent(id, i -> {
            Type type = types.get(id);
            if (type == null) {

        return getService(TypeRegistry.class).require(id);
    }

    @Override
    public Language requireLanguage(String id) {
        return getService(LanguageRegistry.class).require(id);
    }

    @Override
    public Packaging requirePackaging(String id) {
        return getService(PackagingRegistry.class).require(id);
    }

    @Override

        this.typeRegistry = requireNonNull(typeRegistry, "typeRegistry");
    }

    @Override
    public ArtifactType get(String typeId) {
        Type type = typeRegistry.require(typeId);
        if (type instanceof ArtifactType) {
            return (ArtifactType) type;
        }
        if (type != null) {
            return new DefaultType(
                    type.id(),

     * 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>
     * Shortcut for {@code getService(LanguageRegistry.class).require(...)}.
     *

     * create a custom {@code Type} for it.
     *
     * @param id the id of the type to retrieve
     * @return the type
     */
    @Nonnull
    @Override
    default Type require(@Nonnull String id) {
        return lookup(id).orElseThrow(() -> new IllegalArgumentException("Unknown extensible enum value '" + id + "'"));
    }

implementation class. Finally, some Log implementations (such as the one for Log4J) require an external configuration file for the entire logging environment. This file should be prepared in a manner that is specific to the actual logging technology being used. Using the Logging Package APIs Use of the Logging Package APIs, from the perspective of an application component, consists of the following steps: Acquire a reference to an instance of org.apache.commons.logging.Log, by calling the factory...

      <fields>
        <field>
          <name>groupId</name>
          <required>true</required>
          <version>1.0.0+</version>
          <type>String</type>
          <description>The group id of the dependency.</description>
        </field>
        <field>
          <name>artifactId</name>
          <required>true</required>
          <version>1.0.0+</version>
          <type>String</type>

    the mojo to the lifecycle.

    In this case, the client is <<offline>>, and the mojo does not require
    online status.

  * If <<<(offline == false) && (requiresOnline == true)>>>, bind
    the mojo to the lifecycle.

    In this case, the client is <<online>>, and the mojo either requires
    <<online>> status, or else doesn't care.

                    String msg = str + " aggregator mojo is already being executed "
                            + "in this parallel build, those kind of mojos require exclusive access to "
                            + "reactor to prevent race conditions. This mojo execution will be blocked "
                            + "until the aggregator mojo is done.";
                    warn(msg);

    the same other JDK instance without hardcoding absolute paths into the {@code pom.xml}
    and without configuring every plugin that require path to JDK tools.</p>

    @see <a href="/guides/mini/guide-using-toolchains.html">Guide to Using Toolchains</a>
    ]]></description>

  <defaults>
    <default>
      <key>package</key>