* @since 3.1.0
 */
public class BaseSlf4jConfiguration implements Slf4jConfiguration {
    private static final Logger LOGGER = LoggerFactory.getLogger(BaseSlf4jConfiguration.class);

    public void setRootLoggerLevel(Level level) {
        LOGGER.warn("setRootLoggerLevel: operation not supported");
    }

    public void activate() {
        LOGGER.warn("activate(): operation not supported");
    }

        Logger rootLogger = Logger.getLogger("");
        rootLogger.setLevel(Level.ALL);
        ConsoleHandler handler = new ConsoleHandler();
        handler.setFormatter(new SimpleFormatter());
        handler.setLevel(Level.ALL);
        rootLogger.addHandler(handler);
    }

    @Override
    public void tearDown() throws Exception {
        super.tearDown();

      replaceWith =
        ReplaceWith(
          expression = "content.toRequestBody(contentType)",
          imports = ["okhttp3.RequestBody.Companion.toRequestBody"],
        ),
      level = DeprecationLevel.WARNING,
    )
    fun create(
      contentType: MediaType?,
      content: String,
    ): RequestBody = content.toRequestBody(contentType)

    @JvmStatic
    @Deprecated(

)

// loadAPIRequestsHTTPMetrics - reads S3 HTTP metrics.
//
// This is a `MetricsLoaderFn`.
//
// This includes node level S3 HTTP metrics.
//
// This function currently ignores `opts`.
func loadAPIRequestsHTTPMetrics(ctx context.Context, m MetricValues, _ *metricsCache) error {
	// Collect node level S3 HTTP metrics.
	httpStats := globalHTTPStats.toServerHTTPStats(false)

	var message string
	if msg != "" {
		message = fmt.Sprintf(msg, args...)
	} else {
		message = fmt.Sprint(args...)
	}
	logJSON, err := json.Marshal(&log.Entry{
		Level:   FatalKind,
		Message: message,
		Time:    time.Now().UTC(),
		Trace:   &log.Trace{Message: message, Source: []string{getSource(6)}},
	})
	if err != nil {
		panic(err)
	}

 |
 |  1. User Level. This toolchains.xml file provides configuration for a single user,
 |                 and is normally provided in ${user.home}/.m2/toolchains.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -t /path/to/user/toolchains.xml
 |
 |  2. Installation Level.

import com.google.common.collect.Lists;
import com.google.errorprone.annotations.concurrent.GuardedBy;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * A {@code TearDownStack} contains a stack of {@link TearDown} instances.
 *
 * <p>This class is thread-safe.
 *
 * @author Kevin Bourrillion
 * @since 10.0
 */

import com.google.common.collect.Lists;
import com.google.errorprone.annotations.concurrent.GuardedBy;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * A {@code TearDownStack} contains a stack of {@link TearDown} instances.
 *
 * <p>This class is thread-safe.
 *
 * @author Kevin Bourrillion
 * @since 10.0
 */

  AnnotationTarget.CONSTRUCTOR,
  AnnotationTarget.FUNCTION,
  AnnotationTarget.PROPERTY_GETTER,
  AnnotationTarget.PROPERTY_SETTER,
  AnnotationTarget.TYPEALIAS,
)
@RequiresOptIn(level = RequiresOptIn.Level.ERROR)

To work around this, Istio has a variety of abstractions meant to make writing controllers easier.

## Clients

Istio offers a variety of increasingly high level abstractions on top of the common Kubernetes [`client-go`](https://github.com/kubernetes/client-go).

```mermaid
flowchart TD
    kcg["Kubernetes client-go"]
    ic["Istio kube.Client"]
    ikc["Istio kclient.Client"]