import java.lang.annotation.Target;

/**
 * The annotated element must not be null.
 * <p>
 * Annotated fields must not be null after construction has completed.
 * <p>
 * When this annotation is applied to a method it applies to the method return value.
 *
 * @see Nullable
 * @since 4.0.0
 */
@Experimental
@Documented
@Retention(RetentionPolicy.CLASS)

## Exemplo

Para um exemplos simples, vamos considerar uma estrutura de arquivos semelhante ao descrito em [Bigger Applications](../tutorial/bigger-applications.md){.internal-link target=_blank} e [Testing](../tutorial/testing.md){.internal-link target=_blank}:

```
.
├── app
│   ├── __init__.py

/target/
/.settings/
/fess-crawler*/target/
/fess-crawler*/bin/
/fess-crawler*/mydbflute/
/fess-crawler*/.project
/fess-crawler*/.classpath
/fess-crawler*/.settings/
/fess-crawler*/dependency-reduced-pom.xml
/fess-crawler*/dbflute_crawler/log/*.log
/fess-crawler*/dbflute_crawler/schema/project-schema-robot.xml
/fess-crawler/phantomjsdriver.log
.project
.idea

    }

    private File findInProjectLocalRepository(Artifact artifact) {
        Path target = getArtifactPath(artifact);
        return Files.isRegularFile(target) ? target.toFile() : null;
    }

    /**
     * We are interested in project success events, in which case we call

.org/draft/2019-09/json-schema-validation.html#rfc.section.9.5" class="external-link" target="_blank">`examples`</a>, но OpenAPI 3.0.3 основан на более старой версии JSON-схемы, которая не имела поля `examples`.

Таким образом, OpenAPI 3.0.3 определяет своё собственное поле <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.3.md#fixed-fields-20" class="external-link" target="_blank">`example`</a> для модифицированной версии **JSON Schema**, которую он использует...

По указанным причинам текущие версии до сих пор `0.x.x`. Это говорит о том, что каждая версия может содержать обратно несовместимые изменения, следуя <a href="https://semver.org/" class="external-link" target="_blank">соглашению о Семантическом Версионировании</a>.

    @Required
    public String target;

    @Required
    public String scriptType;

    public String scriptData;

    public String scriptResult;

    @Required
    public String startTime;

    public String endTime;

    public void initialize() {
        id = null;
        jobName = null;
        jobStatus = null;
        target = null;
        scriptType = null;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.CONSTRUCTOR;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

@Target({FIELD, CONSTRUCTOR, METHOD})
@Retention(RUNTIME)
@Documented

## Technische Details

Die Klasse `BackgroundTasks` stammt direkt von <a href="https://www.starlette.io/background/" class="external-link" target="_blank">`starlette.background`</a>.

		if _, ok := sset[k]; !ok {
			nset.add(k)
		}
	}

	return nset
}

// NewTargetIDSet - creates new TargetID set with given TargetIDs.
func NewTargetIDSet(targetIDs ...TargetID) TargetIDSet {
	set := make(TargetIDSet)
	for _, targetID := range targetIDs {
		set.add(targetID)
	}
	return set