* upgrade Maven projects to be compatible with Maven 4. The tool is organized around
 * a goal-based architecture with pluggable upgrade strategies.</p>
 *
 * <h2>Architecture Overview</h2>
 *
 * <h3>Goals</h3>
 * <ul>
 *   <li>{@link org.apache.maven.cling.invoker.mvnup.goals.Check} - Analyzes projects and reports needed upgrades</li>

import org.apache.maven.lifecycle.internal.TaskSegment;

/**
 * <p>
 * A {@link Builder} encapsulates a strategy for building a set of Maven projects. The default strategy in Maven builds
 * the projects serially, but a {@link Builder} can employ any type of concurrency model to build the projects.
 * </p>
 * <strong>Note:</strong> This interface is part of work in progress and can be changed or removed without notice.
 */

                    .get());
            options.addOption(Option.builder(PROJECT_LIST)
                    .longOpt("projects")
                    .desc(

import org.apache.maven.lifecycle.internal.builder.Builder;

/**
 * <p>
 * A {@link Builder} encapsulates a strategy for building a set of Maven projects. The default strategy in Maven builds
 * the projects serially, but a {@link Builder} can employ any type of concurrency model to build the projects.
 */
@Named("singlethreaded")
@Singleton
public class SingleThreadedBuilder implements Builder {

  </a>
  <a href="https://bestpractices.coreinfrastructure.org/projects/4898">
    <img src="https://bestpractices.coreinfrastructure.org/projects/4898/badge" alt="CII Best Practices">
  </a>
  <a href="https://gradle.org/slack-invite">

                .build());
        options.addOption(Option.builder(PROJECT_LIST)
                .longOpt("projects")
                .desc(

    /**
     * Returns the list of specified reactor projects to build instead of all projects.
     *
     * @return an {@link Optional} containing the list of project names to build, or empty if not specified
     */
    @Nonnull
    Optional<List<String>> projects();

    /**
     * Indicates whether Maven should also build the specified projects' dependencies.
     *

            infoMain("Reactor Build Order:");

            logger.info("");

            final List<MavenProject> projects = event.getSession().getProjects();
            for (MavenProject project : projects) {
                int len = lineLength
                        - project.getName().length()
                        - project.getPackaging().length()
                        - 2;

    }

    /**
     * @param project The project to look for resources.
     * @param filter  Optional filter function to filter the returned resources
     * @return Returns the {@link FileTree} for main resources from Java projects. Returns null if no files exist.
     */
    @Nullable
    public static FileTree getJavaMainSourceResources(Project project, Action<? super PatternFilterable> filter) {

            }
        }

        return true;
    }

    private Set<String> getReactorProjectKeys(Collection<MavenProject> projects) {
        Set<String> projectKeys = new HashSet<>(projects.size() * 2);
        for (MavenProject project : projects) {
            String key = ArtifactUtils.key(project.getGroupId(), project.getArtifactId(), project.getVersion());
            projectKeys.add(key);
        }