persistResumptionData(result, session);
                return result;
            } else {
                session.getAllProjects().stream()
                        .filter(MavenProject::isExecutionRoot)
                        .findFirst()
                        .ifPresent(buildResumptionDataRepository::removeResumptionData);
            }
        } finally {
            try {

    // weirdness.
    public MavenProject getTopLevelProject() {
        return sortedProjects.stream()
                .filter(MavenProject::isExecutionRoot)
                .findFirst()
                .orElse(null);
    }

    public List<MavenProject> getSortedProjects() {
        return sortedProjects;
    }

            MavenProject first = projects.get(0);
            this.currentProject = ThreadLocal.withInitial(() -> first);
            this.topLevelProject = projects.stream()
                    .filter(project -> project.isExecutionRoot())
                    .findFirst()
                    .orElse(first);
        } else {
            this.currentProject = new ThreadLocal<>();
            this.topLevelProject = null;
        }

    private void enrichRequestFromResumptionData(List<MavenProject> projects, MavenExecutionRequest request) {
        if (request.isResume()) {
            projects.stream()
                    .filter(MavenProject::isExecutionRoot)
                    .findFirst()
                    .ifPresent(rootProject -> buildResumptionDataRepository.applyResumptionData(request, rootProject));
        }
    }

        assertTrue(project.getPluginArtifactRepositories().isEmpty());

        assertNull(project.getParent());
        assertNull(project.getParentArtifact());

        assertFalse(project.isExecutionRoot());
    }

    @Override
    protected ArtifactRepository getLocalRepository() throws Exception {
        return repositorySystem.createLocalRepository(getLocalRepositoryPath());
    }

    @Test

        return getBuild().getFilters();
    }

    public Map<String, MavenProject> getProjectReferences() {
        return projectReferences;
    }

    public boolean isExecutionRoot() {
        return executionRoot;
    }

    public void setExecutionRoot(boolean executionRoot) {
        this.executionRoot = executionRoot;
    }

    public String getDefaultGoal() {