}

    private void validateIdentity() {
        if (empty(groupId)) {
            throw new InvalidArtifactRTException(
                    groupId, artifactId, getVersion(), type, "The groupId cannot be empty.");
        }

        if (artifactId == null) {
            throw new InvalidArtifactRTException(
                    groupId, artifactId, getVersion(), type, "The artifactId cannot be empty.");
        }

    }

    private Plugin createPlugin(String groupId, String artifactId, String version) {
        Plugin plugin = new Plugin();
        plugin.setGroupId(groupId);
        plugin.setArtifactId(artifactId);
        plugin.setVersion(version);
        return plugin;
    }

    private Extension createExtension(String groupId, String artifactId, String version) {
        Extension extension = new Extension();

        then:
        0 * downstreamListener._
    }

    def "forwards log events that are not grouped during execution of build operation that is grouped"() {
        given:

          </plugin>
          <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-pmd-plugin</artifactId>
          </plugin>
          <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>cobertura-maven-plugin</artifactId>
          </plugin>
          <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>taglist-maven-plugin</artifactId>

        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-pmd-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>cobertura-maven-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>taglist-maven-plugin</artifactId>

 *
 * <p><a id="iteration"></a>
 *
 * <p><b>Key-grouped iteration.</b> All view collections follow the same iteration order. In all
 * current implementations, the iteration order always keeps multiple entries with the same key
 * together. Any creation method that would customarily respect insertion order (such as {@link
 * #copyOf(Multimap)}) instead preserves key-grouped order by inserting entries for an existing key

        }
        return target;
    }

    public static <K, V> Map<K, Collection<V>> groupBy(Iterable<? extends V> iterable, InternalTransformer<? extends K, V> grouper) {
        ImmutableListMultimap.Builder<K, V> builder = ImmutableListMultimap.builder();

        for (V element : iterable) {
            K key = grouper.transform(element);
            builder.put(key, element);
        }

                    <dependency>
                        <groupId>com.github.stephenc.wagon</groupId>
                        <artifactId>wagon-gitsite</artifactId>
                        <version>0.4.1</version>
                    </dependency>
                    <dependency>
                        <groupId>org.apache.maven.doxia</groupId>
                        <artifactId>doxia-module-markdown</artifactId>

    public static class Artifact {
        private String groupId;

        private String artifactId;

        private String version;

        private String extension;

        private String classifier;

        public Artifact(String groupId, String artifactId, String version, String extension, String classifier) {
            this.groupId = groupId;
            this.artifactId = artifactId;

        def modelExpectations = details.models.findAll { it.count > 0 }
        def expectedProjectModels = modelExpectations.groupBy { it.path }
        def expectedProjectModelsCounts = remapValues(expectedProjectModels) { it.count.sum() as int }

        def projectModels = projectScopedModels.groupBy { it.buildTreePath }
        def projectModelsShortNames = remapValues(projectModels) { it.shortModelName }