}

    /**
     * Creates .mvn directory in the root directory if it doesn't exist and the model isn't upgraded to 4.1.0.
     * This avoids the warning about not being able to find the root directory.
     */
    protected void createMvnDirectoryIfNeeded(UpgradeContext context) {
        context.info("");
        context.info("Creating .mvn directory if needed to avoid root directory warnings...");

            assertNotNull(ex);
        }
    }

    @Nested
    @DisplayName("Input validation tests")
    class InputValidationTests {

        @Test
        @DisplayName("list with null root throws NullPointerException")
        void list_withNullRoot_throwsNpe() {
            // Intent: null root is invalid input

            root.attribute("xsi:schemaLocation", newSchemaLocation);
            context.detail("Updated xsi:schemaLocation");
        }
    }

    /**
     * Converts modules to subprojects for 4.1.0 compatibility using domtrip.
     */
    private void convertModulesToSubprojects(Editor editor, UpgradeContext context) {
        Element root = editor.root();
        if (root == null) {
            return;

 * from these Documents as needed for superior formatting preservation.
 */
public class PomDiscovery {

    private PomDiscovery() {
        // noop
    }

    /**
     * Discovers and loads all POM files starting from the given directory.
     *
     * @param startDirectory the directory to start discovery from

                                        "type": "array",
                                        "items": {"$ref": "#/components/schemas/Item"},
                                    }
                                }
                            },
                        },
                        "404": {
                            "description": "Not Found",

            addSourceRoot(scope, language, path);
        }
    }

    /**
     * Removes a source root from the project.
     *
     * @param scope the scope of the source root
     * @param language the language of the source root
     * @param directory the directory of the source root
     */
    public void removeSourceRoot(@Nonnull ProjectScope scope, @Nonnull Language language, @Nonnull Path directory) {

                SmbTransport trans = null;

                root = root.toLowerCase();

                /* The link entries contain maps of referrals by path representing DFS links.
                 * Note that paths are relative to the root like "\" and not "\example.com\root".
                 */
                CacheEntry links = (CacheEntry) roots.get(root);
                if (links != null && now > links.expiration) {

        }
        if (logger.isDebugEnabled()) {
            logger.debug("Loaded DataStore: name={}", name);
        }
        dataStoreMap.put(name.toLowerCase(Locale.ROOT), dataStore);
        dataStoreMap.put(dataStore.getClass().getSimpleName().toLowerCase(Locale.ROOT), dataStore);
    }

    /**
     * Retrieves a data store instance by name.
     * The lookup is case-insensitive and will match both registered names

    private Map<Dependency, List<Exception>> resolutionErrors = new IdentityHashMap<>();

    @Override
    public DependencyNode getDependencyGraph() {
        return root;
    }

    public void setDependencyGraph(DependencyNode root) {
        this.root = root;
    }

    @Override
    public List<Dependency> getDependencies() {
        return dependencies;
    }

    @Override

     */
    public static boolean removeModelVersion(Document document) {
        Element root = document.root();
        if (root == null) {
            return false;
        }

        Element modelVersionElement = root.child(MODEL_VERSION).orElse(null);
        if (modelVersionElement != null) {
            return root.removeNode(modelVersionElement);
        }
        return false;
    }

    /**