<configuration>
              <logFile>target/it.properties</logFile>
            </configuration>
            <executions>
              <execution>
                <id>first</id>
                <phase>validate</phase>
                <goals>
                  <goal>reset</goal>
                </goals>
              </execution>
            </executions>
          </plugin>
          <plugin>

@Singleton
public final class DefaultLifecycleProvider extends AbstractLifecycleProvider {
    static final String LIFECYCLE_ID = "default";

    // START SNIPPET: default
    private static final String[] PHASES = {
        "validate",
        "initialize",
        "generate-sources",
        "process-sources",
        "generate-resources",
        "process-resources",
        "compile",
        "process-classes",

            <artifactId>b</artifactId>
            <version>0.1</version>
          </dependency>
        </dependencies>
        <executions>
          <execution>
            <id>load</id>
            <phase>validate</phase>
            <configuration>
              <resourcePaths>org/apache/maven/its/mng3906/SomeClass.class</resourcePaths>
              <pluginClassLoaderOutput>target/pcl.properties</pluginClassLoaderOutput>

    <plugins>
      <plugin>
        <groupId>org.apache.maven.its.plugins</groupId>
        <artifactId>maven-it-plugin-configuration</artifactId>
        <executions>
          <execution>
            <phase>validate</phase>
            <goals>
              <goal>config</goal>
            </goals>
            <configuration>
              <stringParams>
                <stringParam>one</stringParam>

        <groupId>org.apache.maven.its.plugins</groupId>
        <artifactId>maven-it-plugin-expression</artifactId>
        <version>2.1-SNAPSHOT</version>
        <executions>
          <execution>
            <phase>validate</phase>
            <goals>
              <goal>eval</goal>
            </goals>
            <configuration>
              <outputFile>target/pom.properties</outputFile>
              <expressions>

    }

    /**
     * Validate the specified settings.
     *
     * @param settings The settings to validate, must not be {@code null}.
     * @return The list of problems that were encountered, must not be {@code null}.
     */
    @Nonnull
    default List<BuilderProblem> validate(@Nonnull Settings settings) {
        return validate(settings, false);
    }

    /**

            <id>b</id>
            <phase>validate</phase>
          </execution>
          <execution>
            <id>a</id>
            <phase>validate</phase>
          </execution>
          <execution>
            <id>d</id>
            <phase>validate</phase>
          </execution>
          <execution>
            <id>c</id>
            <phase>validate</phase>
          </execution>
          <execution>

            <systemPath>${basedir}/tools.jar</systemPath>
          </dependency>
        </dependencies>
        <executions>
          <execution>
            <id>load</id>
            <phase>validate</phase>
            <configuration>
              <resourcePaths>maven-core-it.properties</resourcePaths>
              <pluginClassLoaderOutput>target/pcl.properties</pluginClassLoaderOutput>
            </configuration>

    protected AbstractMavenPluginDependenciesValidator(PluginValidationManager pluginValidationManager) {
        this.pluginValidationManager = requireNonNull(pluginValidationManager);
    }

    @Override
    public void validate(
            RepositorySystemSession session,
            Artifact pluginArtifact,
            ArtifactDescriptorResult artifactDescriptorResult) {
        if (artifactDescriptorResult.getDependencies() != null) {

/**
 * DefaultMavenPluginValidator
 */
@Named
@Singleton
class DefaultMavenPluginValidator implements MavenPluginValidator {

    @Override
    public void validate(Artifact pluginArtifact, PluginDescriptor pluginDescriptor, List<String> errors) {
        if (!pluginArtifact.getGroupId().equals(pluginDescriptor.getGroupId())) {