}

    protected void assertLocalArtifactNotPresent(Artifact artifact) throws Exception {
        ArtifactRepository localRepo = localRepository();

        String path = localRepo.pathOf(artifact);

        File file = new File(localRepo.getBasedir(), path);

        assertFalse(file.exists(), "Local artifact " + file + " should not be present.");
    }

    }

    // Backward compat

    /**
     * Returns the plugin context for given key ({@link PluginDescriptor#getPluginLookupKey()} and
     * {@link MavenProject}, never returns {@code null} as if context not present, creates it.
     *
     * <strong>Implementation note:</strong> while this method return type is {@link Map}, the returned map instance
     * implements {@link ConcurrentMap} as well.
     *
     */

    static {
        Collection<String> translatedPrefixes = new HashSet<>();

        // MNG-1927, MNG-2124, MNG-3355:
        // If the build section is present and the project directory is non-null, we should make
        // sure interpolation of the directories below uses translated paths.

    private static final List<String> TRANSLATED_PATH_EXPRESSIONS;

    static {
        List<String> translatedPrefixes = new ArrayList<>();

        // MNG-1927, MNG-2124, MNG-3355:
        // If the build section is present and the project directory is non-null, we should make
        // sure interpolation of the directories below uses translated paths.

    @Nonnull
    List<Project> getProjects();

    /**
     * Returns the plugin context for mojo being executed and the specified
     * {@link Project}, never returns {@code null} as if context not present, creates it.
     *
     * <strong>Implementation note:</strong> while this method return type is {@link Map}, the
     * returned map instance implements {@link java.util.concurrent.ConcurrentMap} as well.
     *

                resolve(artifact, remoteRepositories, session);
            } catch (ArtifactNotFoundException anfe) {
                // These are cases where the artifact just isn't present in any of the remote repositories
                // because it wasn't deployed, or it was deployed in the wrong place.

                synchronized (result) {
                    result.addMissingArtifact(artifact);

                                            if (versions.isEmpty()) {
                                                throw new OverConstrainedVersionException(
                                                        "No versions are present in the repository for the artifact"
                                                                + " with a range " + versionRange,
                                                        artifact,

        for (Artifact a : artifacts) {
            if (a.getGroupId().equals("org.apache.maven.its.mng3586")
                    && a.getArtifactId().equals("tools")) {
                // The system scoped dependencies will be present in the classloader for the plugin
                return;
            }
        }

        fail("Can't find the system scoped dependency in the plugin artifacts.");
    }

    }

    /**
     * Aggregating mojo executions (possibly) modify all MavenProjects, including those that are currently in use
     * by concurrently running mojo executions. To prevent race conditions, an aggregating execution will block
     * all other executions until finished.
     * We also lock on a given project to forbid a forked lifecycle to be executed concurrently with the project.

                        Files.getLastModifiedTime(outputFile).toMillis();
                if (outputFileLastModified > artifactLastModified) {
                    LOGGER.warn(
                            "File '{}' is more recent than the packaged artifact for '{}', "
                                    + "please run a full `mvn package` build",
                            relativizeOutputFile(outputFile),