Thread owner = aggregatorLock.getOwner();
                MojoDescriptor ownerMojo = owner != null ? mojos.get(owner) : null;
                String str = ownerMojo != null ? " The " + ownerMojo.getId() : "An";
                String msg = str + " aggregator mojo is already being executed "
                        + "in this parallel build, those kind of mojos require exclusive access to "

        this.properties = Collections.unmodifiableMap(properties);
    }

    @Override
    public String id() {
        return id;
    }

    @Override
    public String getId() {
        return id();
    }

    @Override
    public Language getLanguage() {
        return language;
    }

    @Override
    public String getExtension() {
        return extension;
    }

        if (!model.getMixins().isEmpty() && !flattenEnabled && !model.isPreserveModelVersion()) {
            throw new MavenException("The consumer POM for "
                    + project.getId()
                    + " cannot be created because the POM contains mixins. "
                    + "Mixins are not supported in the default consumer POM format. "

    @Override
    public void flush() {
        for (CacheRecord record : cache.values()) {
            ClassRealm realm = record.getRealm();
            try {
                realm.getWorld().disposeRealm(realm.getId());
            } catch (NoSuchRealmException e) {
                // ignore
            }
        }
        cache.clear();
    }

    @Override

            }
        }
    }

    protected void mergeSite_Id(Site target, Site source, boolean sourceDominant, Map<Object, Object> context) {
        String src = source.getId();
        if (src != null) {
            if (sourceDominant || target.getId() == null) {
                target.setId(src);
                target.setLocation("id", source.getLocation("id"));
            }
        }
    }

    }

    public List<MavenProject> getTransitiveUpstreamProjects() {
        return transitiveUpstreamProjects;
    }

    @Override
    public String toString() {
        return getProject().getId() + " -> " + getTaskSegment();
    }

        } catch (InterpolationException e) {
            problems.add(new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
                    .setMessage("Failed to interpolate file location " + path + " for profile " + profile.getId() + ": "
                            + e.getMessage())
                    .setLocation(file.getLocation(missing ? "missing" : "exists"))
                    .setException(e));
            return false;
        }

        MavenProject project1 = getProjectWithDependencies(pom1);

        assertEquals(pom0Basedir, project1.getParent().getBasedir());
        System.out.println("Project " + project1.getId() + " " + project1);
        Map map = project1.getArtifactMap();
        assertNotNull(map, "No artifacts");
        assertFalse(map.isEmpty(), "No Artifacts");

        List<Artifact> trial = getTrail();

        List<String> ret = new ArrayList<>(trial.size());

        for (Artifact artifact : trial) {
            ret.add(artifact.getId());
        }

        return ret;
    }

    private List<Artifact> getTrail() throws OverConstrainedVersionException {
        if (trail == null) {
            List<Artifact> ids = new LinkedList<>();

    }

    @Override
    public String toString() {
        StringBuilder buffer = new StringBuilder(128);
        if (mojoDescriptor != null) {
            buffer.append(mojoDescriptor.getId());
        }
        buffer.append(" {execution: ").append(executionId).append('}');
        return buffer.toString();
    }

    public String getGroupId() {
        if (mojoDescriptor != null) {