this.listeners = listeners; // NB this is live injected collection
    }

    @Override
    public void beforeProjectExecution(ProjectExecutionEvent event) throws LifecycleExecutionException {
        for (ProjectExecutionListener listener : listeners) {
            listener.beforeProjectExecution(event);
        }
    }

    @Override

    private final List<ProjectExecutionListener> listeners = new CopyOnWriteArrayList<>();

    @Override
    public void beforeProjectExecution(ProjectExecutionEvent event) throws LifecycleExecutionException {
        for (ProjectExecutionListener listener : listeners) {
            listener.beforeProjectExecution(event);
        }
    }

    @Override

            @Override
            public void beforeProjectExecution(ProjectExecutionEvent event) throws LifecycleExecutionException {
                assertNotNull(event.getSession());
                assertNotNull(event.getProject());
                assertNull(event.getExecutionPlan());
                assertNull(event.getCause());

                log.add("beforeProjectExecution " + event.getProject().getArtifactId());
            }

 *
 * @see ExecutionListener
 * @see MojoExecutionListener
 * @since 3.1.2
 */
public interface ProjectExecutionListener {
    void beforeProjectExecution(ProjectExecutionEvent event) throws LifecycleExecutionException;

    void beforeProjectLifecycleExecution(ProjectExecutionEvent event) throws LifecycleExecutionException;

            transformerManager.injectTransformedArtifacts(session.getRepositorySession(), currentProject);

            BuilderCommon.attachToThread(currentProject);

            projectExecutionListener.beforeProjectExecution(new ProjectExecutionEvent(session, currentProject));

            eventCatapult.fire(ExecutionEvent.Type.ProjectStarted, session, null);

            MavenExecutionPlan executionPlan =

        this.delegate = delegate;
        this.buildEventListener = buildEventListener;
    }

    @Override
    public void beforeProjectExecution(ProjectExecutionEvent projectExecutionEvent)
            throws LifecycleExecutionException {}

    @Override
    public void beforeProjectLifecycleExecution(ProjectExecutionEvent projectExecutionEvent)

                    attachToThread(step);
                    transformerManager.injectTransformedArtifacts(session.getRepositorySession(), step.project);
                    projectExecutionListener.beforeProjectExecution(new ProjectExecutionEvent(session, step.project));
                    eventCatapult.fire(ExecutionEvent.Type.ProjectStarted, session, null);
                    break;
                case TEARDOWN: