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)

    }

    @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();
    }

router_c = APIRouter(route_class=APIRouteC)


@router_a.get("/")
def get_a():
    return {"msg": "A"}


@router_b.get("/")
def get_b():
    return {"msg": "B"}


@router_c.get("/")
def get_c():
    return {"msg": "C"}


router_b.include_router(router=router_c, prefix="/c")
router_a.include_router(router=router_b, prefix="/b")
app.include_router(router=router_a, prefix="/a")

     *
     * @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

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

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

                pomConfiguration = plugin.getDelegate().getConfiguration();
            }

            XmlNode mojoConfiguration = mojoExecution.getConfiguration() != null
                    ? mojoExecution.getConfiguration().getDom()
                    : null;

            XmlNode mergedConfiguration = XmlService.merge(mojoConfiguration, pomConfiguration);

            mojoExecution.setConfiguration(mergedConfiguration);

        when(mavenExecutionRequest.getProjectActivation()).thenReturn(projectActivation);
        when(mavenExecutionRequest.getMakeBehavior()).thenReturn(parameterMakeBehavior);
        when(mavenExecutionRequest.getPom()).thenReturn(parameterRequestedPom);
        when(mavenExecutionRequest.isRecursive()).thenReturn(parameterRecursive);
        if (parameterResumeFrom != null && !parameterResumeFrom.isEmpty()) {