String groupId = model.getGroupId();
        if (groupId == null && model.getParent() != null) {
            groupId = model.getParent().getGroupId();
        }
        String artifactId = model.getArtifactId();
        String version = model.getVersion();
        if (version == null && model.getParent() != null) {
            version = model.getParent().getVersion();
        }
        return toId(groupId, artifactId, version);
    }

        String groupId = m.getGroupId();
        if (groupId == null && m.getParent() != null) {
            groupId = m.getParent().getGroupId();
        }

        String version = m.getVersion();
        if (version == null && m.getParent() != null) {
            version = m.getParent().getVersion();
        }

        return new RelativeProject(groupId, m.getArtifactId(), version);
    }

            if (pluginVersion != null) {
                return pluginVersion;
            }
            ClassLoaderScope parent = scope.getParent();
            if (scope == parent) {
                // See RootClassLoaderScope#getParent()
                break;
            }
            scope = parent;
        }
        return null;
    }

            Optional<MavenProject> parentIsPartOfThisBuild = projects.stream().filter(proj ->
                project.getParent() == null || (project.getParent() != null && proj.getArtifactId().equals(project.getParent().getArtifactId()) && proj.getGroupId().equals(project.getParent().getGroupId()))
            ).findFirst();

                })
                .orElse(null);
    }

    private String getVersion(Model model) {
        String version = model.getVersion();
        if (version == null && model.getParent() != null) {
            version = model.getParent().getVersion();
        }
        return version;
    }

    void put(Path pomFile, Model model) {
        modelsByPath.put(pomFile, model);
        modelsByGa

        // we want to see all top-level thread groups
        ThreadGroup tg = Thread.currentThread().getThreadGroup();
        while (tg.getParent() == null) {
            tg = tg.getParent();
        }

        ThreadGroup[] tgList = new ThreadGroup[tg.activeGroupCount()];
        tg.enumerate(tgList);

        boolean seen = false;

        MavenProject project0 = getProjectWithDependencies(pom0);
        MavenProject project1 = getProjectWithDependencies(pom1);

        assertNotNull(project1.getParent(), "Parent is null");
        assertEquals(pom0Basedir, project1.getParent().getBasedir());
        Map map = project1.getArtifactMap();

        assertNotNull(map, "No artifacts");
        assertTrue(map.size() > 0, "No Artifacts");

        File parentFile = element.getParentFile();
        while (parentRelativePath != null && parentRelativePath != RelativePath.EMPTY_ROOT) {
            if (!filter.isSatisfiedBy(new ReadOnlyFileTreeElement(parentFile, parentRelativePath, stat))) {
                return false;
            }
            parentRelativePath = parentRelativePath.getParent();

import javax.annotation.Nullable;

@NonNullApi
public interface InternalProblemGroup {

    String getName();

    String getDisplayName();

    @Nullable
    InternalProblemGroup getParent();

    String getDisplayName();

    /**
     * Returns the parent group or {@code null} for root groups.
     *
     * @return the parent group
     * @since 8.9
     */
    @Nullable
    ProblemGroup getParent();