"type": "string",
                                        "minLength": 3,
                                    },
                                    {"type": "null"},
                                ],
                                "title": "Query string",
                            },
                            "name": "q",
                            "in": "query",

        this.messageBuilderFactory = messageBuilderFactory;
        this.secDispatcher = secDispatcher;
    }

    protected boolean configExists() throws IOException {
        return secDispatcher.readConfiguration(false) != null;
    }

    public Object getValue(String expression) {
        if ("build.timestamp".equals(expression) || "maven.build.timestamp".equals(expression)) {
            return mavenBuildTimestamp.formattedTimestamp();
        }
        return null;
    }

// io.Writer implementation alone avoids also unnecessary buffer copies,
// and as such incurred latencies.
var Discard io.Writer = discard{}

// discard is /dev/null for Golang.
type discard struct{}

func (discard) Write(p []byte) (int, error) {
	return len(p), nil
}

// DiscardReader discarded reader
func DiscardReader(r io.Reader) {
	Copy(Discard, r)

        get() = branchName == MASTER_BRANCH
    val isRelease: Boolean
        get() = branchName == RELEASE_BRANCH
    val isLegacyRelease: Boolean
        get() = OLD_RELEASE_PATTERN.matchEntire(branchName) != null
    val isExperimental: Boolean
        get() = branchName == EXPERIMENTAL_BRANCH

    fun vcsRootId() = DslContext.settingsRoot.id.toString()

        oldExtension.setGroupId(extension.getGroupId());
        oldExtension.setArtifactId(extension.getArtifactId());
        oldExtension.setVersion(extension.getVersion());
        if (extension.getClassLoadingStrategy() != null) {
            oldExtension.setClassLoadingStrategy(extension.getClassLoadingStrategy());
        }
        this.extension = oldExtension;
    }

    public CoreExtension getExtension() {
        return extension;

                IllegalArgumentException.class, () -> rtInfo.isMavenVersion(""), "Bad version range wasn't rejected");

        assertThrows(
                NullPointerException.class, () -> rtInfo.isMavenVersion(null), "Bad version range wasn't rejected");
    }

                .findAny()
                .orElseThrow(() -> new LookupException("No service of type " + type));
    }

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

    @Override
    public <T> Optional<T> lookupOptional(Class<T> type) {
        return Optional.empty();
    }

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

                            "schema": {
                                "anyOf": [
                                    {"type": "string", "pattern": "^fixedquery$"},
                                    {"type": "null"},
                                ],
                                "title": "Q",
                            },
                        }
                    ],
                    "responses": {

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

This means that it will **always have a value**, it's just that sometimes the value could be `None` (or `null` in JSON).