<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image02.png">
</div>

Esto significa que **siempre tendrá un valor**, solo que a veces el valor podría ser `None` (o `null` en JSON).

<div class="screenshot">
<img src="/img/tutorial/separate-openapi-schemas/image02.png">
</div>

Isso significa que ele **sempre terá um valor**, só que às vezes o valor pode ser `None` (ou `null` em termos de JSON).

        Path rootDirectory = findRoot(basedir);
        if (rootDirectory == null) {
            throw new IllegalStateException(getNoRootMessage());
        }
        return rootDirectory;
    }

    @Nullable
    default Path findRoot(Path basedir) {
        Path rootDirectory = basedir;
        while (rootDirectory != null && !isRootDirectory(rootDirectory)) {
            rootDirectory = rootDirectory.getParent();

        return this;
    }

    @Override
    public Model getSuperModel(String version) {
        if (superModel == null) {
            String resource = "/org/apache/maven/model/pom-" + version + ".xml";

            InputStream is = getClass().getResourceAsStream(resource);

            if (is == null) {
                throw new IllegalStateException("The super POM " + resource + " was not found"

     * cache.
     *
     * @param project The project that employs the plugin realm, must not be {@code null}.
     * @param record The cache record being used for the project, must not be {@code null}.
     */
    void register(MavenProject project, Key key, CacheRecord record);

     * @param stringFormatter
     */
    public void setStringFormatter(InputLocation.StringFormatter stringFormatter) {
        delegate.setStringFormatter(
                stringFormatter != null ? location -> stringFormatter.toString(new InputLocation(location)) : null);
    } // -- void setStringFormatter( InputLocation.StringFormatter )

    /**
     * Method write.
     *
     * @param writer a writer object.
     * @param model a model object.

    @Override
    protected String getProjectsDirectory() {
        return null;
    }

    @Test
    void testCachedReactorProjectDependencies() throws Exception {
        MavenSession session = createMavenSession(
                new File("src/test/projects/lifecycle-dependency-resolver/pom.xml"), new Properties(), true);
        Collection<String> scopesToCollect = null;

                                {
                                    "type": "string",
                                },
                                {
                                    "type": "null",
                                },
                            ],
                            "title": "Description",
                        },
                        "name": {

                            "title": "Description",
                            "anyOf": [{"type": "string"}, {"type": "null"}],
                        },
                        "tax": {
                            "title": "Tax",
                            "anyOf": [{"type": "number"}, {"type": "null"}],
                        },
                    },
                },
                "ValidationError": {

@Deprecated
class DefaultMirrorSelectorTest {
    @Test
    void testMirrorWithMirrorOfPatternContainingANegationIsNotSelected() {
        ArtifactRepository repository = new DefaultArtifactRepository("snapshots.repo", "http://whatever", null);
        String pattern = "external:*, !snapshots.repo";
        assertFalse(DefaultMirrorSelector.matchPattern(repository, pattern));
    }