*/
@Experimental
public interface ProjectManager extends Service {
    /**
     * Returns the path to the built project artifact file, if the project has been built.
     *
     * @return the path of the built project artifact
     */
    @Nonnull
    Optional<Path> getPath(Project project);

    /**
     * Returns an immutable collection of attached artifacts for given project.
     */
    @Nonnull

public interface ModelProcessor {

    /**
     * Returns the file containing the pom to be parsed or null if a pom can not be found
     * at the given file or in the given directory.
     */
    @Nullable
    Path locateExistingPom(@Nonnull Path project);

    /**
     * Reads the model from the specified byte stream. The stream will be automatically closed before the method
     * returns.
     *

     *
     * @return the ordered list of the flattened dependency nodes
     */
    @Nonnull
    List<Node> getNodes();

    /**
     * Returns the file paths of all dependencies, regardless on which tool option those paths should be placed.
     * The returned list may contain a mix of Java class-path, Java module-path, and other types of path elements.
     *
     * @return the paths of all dependencies
     */

                return entry.getValue();
            }
        }
        return null;
    }

    @Override
    public List<Exception> getExceptions() {
        return exceptions;
    }

    @Override
    public Node getRoot() {
        return root;
    }

    @Override
    public List<Node> getNodes() {
        return nodes;
    }

    @Override

        this.remainingProjects = remainingProjects;
    }

    /**
     * Returns the projects that still need to be built when resuming.
     * @return A list containing the group and artifact id of the projects.
     */
    public List<String> getRemainingProjects() {
        return this.remainingProjects;
    }

     * @return whether color styling is supported or not
     */
    boolean isColorEnabled();

    /**
     * Returns the terminal width or <code>-1</code> if not supported.
     * @return the terminal width
     */
    int getTerminalWidth();

    /**
     * Creates a new message builder.
     * @return a new message builder
     */
    @Nonnull

            projectKeys.add(key);
        }
        return projectKeys;
    }

    public boolean isEmpty() {
        return items.isEmpty();
    }

    /**
     * @return a set of all the projects managed by the build
     */
    public Set<MavenProject> getProjects() {
        return items.stream().map(ProjectSegment::getProject).collect(Collectors.toSet());
    }

public interface Location {

    /**
     * Return the line number where the current event ends,
     * returns -1 if none is available.
     * @return the current line number
     */
    int getLineNumber();

    /**
     * Return the column number where the current event ends,
     * returns -1 if none is available.
     * @return the current column number
     */
    int getColumnNumber();

    /**

    }

    /**
     * Returns ClassLoader used to load extension classes.
     */
    public ClassRealm getClassRealm() {
        return realm;
    }

    /**
     * Returns artifacts exported by the extension, identified by groupId:artifactId string key.
     */
    public Set<String> getExportedArtifacts() {
        return artifacts;
    }

    /**

    ChecksumAlgorithm select(@Nonnull String algorithmName);

    /**
     * Returns a collection of {@link ChecksumAlgorithm} in same order as algorithm names are ordered, or throws if
     * any of the algorithm name is not supported. The returned collection has equal count of elements as passed in
     * collection of names, and if names contains duplicated elements, the returned list of algorithms will have
     * duplicates as well.
     *