return true
	case emptySHA256:
		// some broken clients set empty-sha256
		// with > 0 content-length in the body,
		// we should skip such clients and allow
		// blindly such insecure clients only if
		// S3 strict compatibility is disabled.

		// We return true only in situations when
		// deployment has asked MinIO to allow for
		// such broken clients and content-length > 0.
		return r.ContentLength > 0 && !globalServerCtxt.StrictS3Compat

	if err := target.send(eventData, ch, confirms); err != nil {
		return err
	}

	// Delete the event from store.
	return target.store.Del(key)
}

// Close - does nothing and available for interface compatibility.
func (target *AMQPTarget) Close() error {
	close(target.quitCh)
	if target.conn != nil {
		return target.conn.Close()
	}
	return nil
}

func (target *AMQPTarget) init() error {

    changes to lower the maintenance cost.
*   Bug fixes also generally require unit tests, because the presence of bugs
    usually indicates insufficient test coverage.
*   Keep API compatibility in mind when you change code in core TensorFlow,
    e.g., code in
    [tensorflow/core](https://github.com/tensorflow/tensorflow/tree/master/tensorflow/core)
    and

   */
  @Throws(IOException::class)
  private fun cacheWritingResponse(
    cacheRequest: CacheRequest?,
    response: Response,
  ): Response {
    // Some apps return a null body; for compatibility we treat that like a null cache request.
    if (cacheRequest == null) return response
    val cacheBodyUnbuffered = cacheRequest.body()

    val source = response.body.source()

### New properties in an existing class

When adding a property to an existing class (task, extension, domain object, etc), the API should consist of managed lazy properties.  However, some exceptions need to be made to keep backwards compatibility with existing builds.

This is preferred when the implementation type is internal:

```groovy
public interface ExistingThing {
    String getOtherProperty()
    void setOtherProperty(String s)

        }
        developers {
          developer {
            name.set("Square, Inc.")
          }
        }
      }
    }
  }

  plugins.withId("binary-compatibility-validator") {
    configure<ApiValidationExtension> {
      ignoredPackages += "okhttp3.logging.internal"
      ignoredPackages += "mockwebserver3.internal"
      ignoredPackages += "okhttp3.internal"

        if (adder != null && isMethodCompatible(adder.method, valueType)) {
            return adder;
        }

        // Return first found for backward compatibility
        return setter != null ? setter : adder;
    }

    /**
     * Build method cache for a class.
     */
    private Map<String, MethodInfo> buildMethodCache(Class<?> beanType) {

Вы увидите примеры этого в следующих главах о реляционных и NoSQL базах данных, безопасности и т.д.

## Совместимость с **FastAPI** { #fastapi-compatibility }

Простота системы **Dependency Injection** делает **FastAPI** совместимым с:

* всеми реляционными базами данных
* NoSQL базами данных
* внешними пакетами
* внешними API

    assertEquals(Integer.MAX_VALUE, ms.tailMultiset("a", CLOSED).size());
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  @AndroidIncompatible // Reflection bug, or actual binary compatibility problem?
  public void testElementSetBridgeMethods() {
    for (Method m : TreeMultiset.class.getMethods()) {
      if (m.getName().equals("elementSet") && m.getReturnType().equals(SortedSet.class)) {
        return;

     * during metadata retrieval.
     */
    int VALIDATION_LEVEL_MINIMAL = 0;

    /**
     * Denotes validation as performed by Maven 2.0. This validation level is meant as a compatibility mode to allow
     * users to migrate their projects.
     */
    int VALIDATION_LEVEL_MAVEN_2_0 = 20;

    /**
     * Denotes validation as performed by Maven 3.0. This validation level is meant for existing projects.