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

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

{* ../../docs_src/sub_applications/tutorial001_py39.py hl[3, 6:8] *}

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

		[case(200)] DfsEnumArray200 *info200;
		[case(300)] DfsEnumArray300 *info300;
	} DfsEnumInfo;

	typedef struct {
		uint32_t level,
		[switch_is(level)] DfsEnumInfo e;
	} DfsEnumStruct;

	[op(0x15)]
	int NetrDfsEnumEx([in,string,unique] wchar_t dfs_name,
			[in] uint32_t level,
			[in] uint32_t prefmaxlen,
			[in,out,unique] DfsEnumStruct *info,
			[in,out,unique] uint32_t *totalentries);

    replaceWith = ReplaceWith(expression = "headers"),
    level = DeprecationLevel.ERROR,
  )
  fun getHeaders(): Headers = headers

  fun setHeaders(headers: Headers) = apply { this.headers = headers }

  @JvmName("-deprecated_getTrailers")
  @Deprecated(
    message = "moved to var",
    replaceWith = ReplaceWith(expression = "trailers"),
    level = DeprecationLevel.ERROR,
  )

     */
    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,

 * limitations under the License.
 */
package okhttp3.internal.concurrent

import java.util.logging.Level
import java.util.logging.Logger

internal inline fun Logger.taskLog(
  task: Task,
  queue: TaskQueue,
  messageBlock: () -> String,
) {
  if (isLoggable(Level.FINE)) {
    log(task, queue, messageBlock())
  }
}

internal inline fun <T> Logger.logElapsed(
  task: Task,

  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "scheme"),
    level = DeprecationLevel.ERROR,
  )
  fun scheme(): String = scheme

  @JvmName("-deprecated_authParams")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "authParams"),
    level = DeprecationLevel.ERROR,
  )
  fun authParams(): Map<String?, String> = authParams

  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "type"),
    level = DeprecationLevel.ERROR,
  )
  fun type(): String = type

  @JvmName("-deprecated_subtype")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "subtype"),
    level = DeprecationLevel.ERROR,
  )
  fun subtype(): String = subtype

  /**

            final int n = NEGOTIATE_REQUEST.encode(sbuf, 4);
            Encdec.enc_uint32be(n & 0xFFFF, sbuf, 0); /* 4 byte ssn msg header */

            if (LogStream.level >= 4) {
                log.println(NEGOTIATE_REQUEST);
                if (LogStream.level >= 6) {
                    Hexdump.hexdump(log, sbuf, 4, n);
                }
            }

            out.write(sbuf, 0, 4 + n);
            out.flush();

            if (context.loggerFactory instanceof LogLevelRecorder recorder) {
                LogLevelRecorder.Level level =
                        switch (logLevelThreshold.toLowerCase(Locale.ENGLISH)) {
                            case "warn", "warning" -> LogLevelRecorder.Level.WARN;
                            case "error" -> LogLevelRecorder.Level.ERROR;
                            default ->

    message = "moved to val",
    replaceWith = ReplaceWith(expression = "dispatcher"),
    level = DeprecationLevel.ERROR,
  )
  fun dispatcher(): Dispatcher = dispatcher

  @JvmName("-deprecated_connectionPool")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "connectionPool"),
    level = DeprecationLevel.ERROR,
  )
  fun connectionPool(): ConnectionPool = connectionPool