### Top-level application { #top-level-application }

First, create the main, top-level, **FastAPI** application, and its *path operations*:

{* ../../docs_src/sub_applications/tutorial001_py310.py hl[3, 6:8] *}

### Sub-application { #sub-application }

        assertNotNull(exception);
        assertEquals("Top level GSA error", exception.getMessage());

        // Check first level cause
        assertNotNull(exception.getCause());
        assertEquals("Intermediate problem", exception.getCause().getMessage());

        // Check second level cause

| 5.x     | ✅                  | APIs subject to change in alpha releases.    |
| 4.x     | ✅                  | Android 5.0+ (API level 21+) and on Java 8+. |
| 3.x     | ❌ Ended 2021-12-31 | Android 2.3+ (API level 9+) and Java 7+.     |


## Reporting a Vulnerability

Square recognizes the important contributions the security research community

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

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

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

    interceptor.level = HttpLoggingInterceptor.Level.BASIC
    var level: HttpLoggingInterceptor.Level = interceptor.level
    interceptor.intercept(newInterceptorChain())
  }

  @Test
  fun httpLoggingInterceptorLevel() {
    val none: HttpLoggingInterceptor.Level = HttpLoggingInterceptor.Level.NONE
    val basic: HttpLoggingInterceptor.Level = HttpLoggingInterceptor.Level.BASIC

)

type Tracer struct {
	Logger logger.Interface
	Test   func(ctx context.Context, begin time.Time, fc func() (sql string, rowsAffected int64), err error)
}

func (S Tracer) LogMode(level logger.LogLevel) logger.Interface {
	return S.Logger.LogMode(level)
}

func (S Tracer) Info(ctx context.Context, s string, i ...interface{}) {
	S.Logger.Info(ctx, s, i...)
}

func (S Tracer) Warn(ctx context.Context, s string, i ...interface{}) {

     * This message is shown to users on the main search page.
     */
    @Size(max = 3000)
    public String notificationSearchTop;

    /**
     * System log level for controlling log verbosity.
     * Controls the level of detail in system log messages.
     */
    @Size(max = 10)
    public String logLevel;

    /**
     * Storage service endpoint URL for cloud storage integration.

import java.util.List;
import java.util.Locale;
import java.util.TreeMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import junit.framework.TestCase;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;
import org.junit.Test;

/**
 * Automatically runs sanity checks against top level classes in the same package of the test that

     */
    ModelBuildingRequest setPomFile(File pomFile);

    /**
     * Gets the level of validation to perform on processed models.
     *
     * @return The level of validation to perform on processed models.
     */
    int getValidationLevel();

    /**
     * Sets the level of validation to perform on processed models. For building of projects,

                        },
                    }
                }
            },
            "components": {
                "schemas": IsOneOf(
                    # Pydantic >= 2.11: no top-level OtherRole
                    {
                        "PlatformRole": {
                            "type": "string",
                            "enum": ["admin", "user"],