*/
public interface ProjectBuildingHelper {

    /**
     * Creates the effective artifact repositories from the specified POM repositories.
     *
     * @param pomRepositories The POM repositories to create the artifact repositories from, must not be {@code null}.
     * @param externalRepositories The external (and already mirrored) repositories to merge into the result list, may
     *            be {@code null}.

            InternalSession.associate(repoSession, iSession);

            List<RemoteRepository> repositories = RepositoryUtils.toRepos(request.getPluginArtifactRepositories());
            UnaryOperator<String> interpolator = createInterpolator(request);

            return resolveCoreExtensions(repoSession, repositories, providedArtifacts, extensions, interpolator);
        }
    }

            repositories = new ArrayList<>(request.getRepositories().size());
            boolean repoMan = false;
            for (RemoteRepository repository : request.getRepositories()) {
                if (repository.isRepositoryManager()) {
                    repoMan = true;
                    repositories.addAll(repository.getMirroredRepositories());
                } else {

    @Override
    public List<ArtifactRepository> getEffectiveRepositories(List<ArtifactRepository> repositories) {
        if (repositories == null) {
            return null;
        }

        Map<String, List<ArtifactRepository>> reposByKey = new LinkedHashMap<>();

        for (ArtifactRepository repository : repositories) {
            String key = repository.getId();

  <groupId>maven-test</groupId>
  <artifactId>t05-a</artifactId>
  <packaging>jar</packaging>
  <version>2.0</version>
  <repositories>
    <repository>
      <id>central</id>
      <name>Fake Maven Central Repository</name>
      <url>file://dummy</url>
    </repository>
  </repositories>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t05-b</artifactId>

    <releasesEnabled>true</releasesEnabled>
  </properties>

  <repositories>
    <repository>
      <id>maven-core-it</id>
      <url>file:///${basedir}/repo</url>
      <releases>
        <!-- That's the boolean POM field we would like to interpolate -->
        <enabled>${releasesEnabled}</enabled>
      </releases>
    </repository>
  </repositories>

  <build>
    <resources>
      <resource>

    /**
     * Adds a repository to use for subsequent resolution requests. The order in which repositories are added matters,
     * repositories that were added first should also be searched first. When multiple repositories with the same
     * identifier are added, only the first repository being added will be used.
     *

  <groupId>maven-test</groupId>
  <artifactId>t04-a</artifactId>
  <packaging>jar</packaging>
  <version>1.0</version>
  <repositories>
    <repository>
      <id>central</id>
      <name>Fake Maven Central Repository</name>
      <url>file://dummy</url>
    </repository>
  </repositories>
  <dependencies>
    <dependency>
      <groupId>maven-test</groupId>
      <artifactId>t04-b</artifactId>

    <configuration>
      <![CDATA[
<repositories>
  ...
</repositories>
    ]]></configuration>
    <description>
      <![CDATA[
      This is a list of ArtifactRepository instances used to resolve the Artifacts associated
      with the current POM.

      NOTE: This list will contain entries for repositories specified by ancestor POMs, including

            this.repositories.add(localRepository);
            this.repositories.addAll(remoteRepositories);

            int hash = 17;
            hash = hash * 31 + artifactHashCode(artifact);
            hash = hash * 31 + (resolveManagedVersions ? 1 : 2);
            hash = hash * 31 + repositoriesHashCode(repositories);
            this.hashCode = hash;
        }

        @Override