}

    @Override
    public Optional<Path> rootDirectory() {
        return Optional.ofNullable(rootDirectory);
    }

    @Override
    public Optional<InputStream> in() {
        return Optional.ofNullable(in);
    }

    @Override
    public Optional<OutputStream> out() {
        return Optional.ofNullable(out);
    }

    @Override
    public Optional<OutputStream> err() {

        Parent parent = model.getParent();
        if (parent != null) {
            String version = parent.getVersion();
            String path = Optional.ofNullable(parent.getRelativePath()).orElse("..");
            if (version == null && !path.isEmpty()) {
                Optional<RelativeProject> resolvedParent = resolveRelativePath(

        return Optional.ofNullable(session.getProject(delegate.getProject()));
    }

    @Override
    public Optional<MojoExecution> getMojoExecution() {
        return Optional.ofNullable(delegate.getMojoExecution()).map(me -> new DefaultMojoExecution(session, me));
    }

    @Override
    public Optional<Exception> getException() {
        return Optional.ofNullable(delegate.getException());
    }

                @Override
                public Optional<Path> getPomFile() {
                    return Optional.ofNullable(res.getPomFile()).map(File::toPath);
                }

                @Nonnull
                @Override
                public Optional<Project> getProject() {
                    return Optional.ofNullable(session.getProject(res.getProject()));
                }

                @Nonnull

            public Optional<Source> getInstallationSettingsSource() {
                return Optional.ofNullable(installationSettingsSource);
            }

            @Nonnull
            @Override
            public Optional<Source> getProjectSettingsSource() {
                return Optional.ofNullable(projectSettingsSource);
            }

            @Nonnull
            @Override

            public Optional<Source> getInstallationToolchainsSource() {
                return Optional.ofNullable(installationToolchainsSource);
            }

            @Nonnull
            @Override
            public Optional<Source> getUserToolchainsSource() {
                return Optional.ofNullable(userToolchainsSource);
            }
        }
    }

    }

    @Override
    public <T> T lookup(Class<T> type, String name) {
        return lookup(type);
    }

    @Override
    public <T> Optional<T> lookupOptional(Class<T> type) {
        return Optional.ofNullable(type.cast(components.get(type)));
    }

    @Override
    public <T> Optional<T> lookupOptional(Class<T> type, String name) {
        return lookupOptional(type);
    }

    @Override

            @Nonnull
            @Override
            public Optional<Path> getPath() {
                return Optional.ofNullable(path);
            }

            @Nonnull
            @Override
            public Optional<Source> getSource() {
                return Optional.ofNullable(source);
            }

            @Override
            public boolean isAllowStubModel() {

        }
        Path path = paths.get(id);
        if (path == null && artifact instanceof DefaultArtifact) {
            path = ((DefaultArtifact) artifact).getArtifact().getPath();
        }
        return Optional.ofNullable(path);
    }

    @Override
    public void setPath(@Nonnull ProducedArtifact artifact, Path path) {
        String id = id(nonNull(artifact, "artifact"));

        return Objects.equals(p, packaging);
    }

    private static Optional<String> getActivationPackaging(org.apache.maven.model.Profile profile) {
        return Optional.ofNullable(profile)
                .map(org.apache.maven.model.Profile::getDelegate)
                .map(Profile::getActivation)
                .map(Activation::getPackaging);
    }