Activation activation = profile.getActivation();

        if (activation == null) {
            return false;
        }

        ActivationOS os = activation.getOs();

        if (os == null) {
            return false;
        }

        boolean active = ensureAtLeastOneNonNull(os);

        String actualOsName = context.getSystemProperties()

            if (!requiredSelectors.isEmpty()) {
                throw new MavenExecutionException(
                        "The requested required projects " + requiredSelectors + " do not exist.", request.getPom());
            } else {
                String optionalSelectors = unresolvedSelectors.stream()
                        .map(ProjectActivation.ProjectActivationSettings::selector)

        Activation activation = profile.getActivation();
        return activation != null && activation.getOs() != null;
    }

    @Override
    public boolean isActive(Profile profile) {
        Activation activation = profile.getActivation();
        ActivationOS os = activation.getOs();

        boolean result = ensureAtLeastOneNonNull(os);

        if (result && os.getFamily() != null) {

    }

    @Override
    public List<MavenProject> collectProjects(MavenExecutionRequest request) throws ProjectBuildingException {
        List<File> files = Collections.singletonList(request.getPom().getAbsoluteFile());
        return projectsSelector.selectProjects(files, request);
    }

        } else {
            this.pluginGroups = Collections.emptyList();
        }

        return this;
    }

    @Override
    public Model getPom() {
        return pom;
    }

    @Override
    public DefaultPluginPrefixRequest setPom(Model pom) {
        this.pom = pom;

        return this;
    }

    @Override

    }

    @Override
    public DefaultPluginVersionRequest setArtifactId(String artifactId) {
        this.artifactId = artifactId;

        return this;
    }

    @Override
    public Model getPom() {
        return pom;
    }

    @Override
    public DefaultPluginVersionRequest setPom(Model pom) {
        this.pom = pom;

        return this;
    }

    @Override

    public String getGoal() {
        return delegate.getGoal();
    }

    @Override
    public Optional<XmlNode> getConfiguration() {
        return Optional.of(delegate.getConfiguration()).map(Xpp3Dom::getDom);
    }

    @Override
    public String toString() {
        return delegate.toString();
    }

      this.v0 ^= k0;
      this.v1 ^= k1;
      this.v2 ^= k0;
      this.v3 ^= k1;
    }

    @Override
    protected void process(ByteBuffer buffer) {
      b += CHUNK_SIZE;
      processM(buffer.getLong());
    }

    @Override
    protected void processRemaining(ByteBuffer buffer) {
      b += buffer.remaining();
      for (int i = 0; buffer.hasRemaining(); i += 8) {

                val = interpolate(org);
                if (org != val) {
                    scm.setDeveloperConnection(val);
                }
                // Tag
                org = scm.getTag();
                val = interpolate(org);
                if (org != val) {
                    scm.setTag(val);
                }
                // Url
                org = scm.getUrl();

     *
     * @return The POM whose build plugins are to be scanned for the version or {@code null} to only search the plugin
     *         repositories.
     */
    Model getPom();

    /**
     * Sets the POM whose build plugins are to be scanned for the version.
     *
     * @param pom The POM whose build plugins are to be scanned for the version, may be {@code null} to only search the