.put(NullPointerException.class, e -> e instanceof NullPointerException)
          .put(NumberFormatException.class, e -> e instanceof NumberFormatException)
          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(SomeCheckedException.class, e -> e instanceof SomeCheckedException)
          .put(SomeError.class, e -> e instanceof SomeError)

import mockwebserver3.junit5.StartStop
import okhttp3.testing.PlatformRule
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

class LoomTest {
  @JvmField
  @RegisterExtension
  val platform = PlatformRule()

  @JvmField
  @RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

  @StartStop

import com.google.common.util.concurrent.AbstractFuture.Listener;
import com.google.common.util.concurrent.internal.InternalFutureFailureAccess;
import org.jspecify.annotations.Nullable;

abstract class AbstractFutureState<V extends @Nullable Object> extends InternalFutureFailureAccess
    implements ListenableFuture<V> {
  final boolean casListeners(@Nullable Listener expect, Listener update) {
    if (listeners == expect) {

import org.codelibs.core.exception.SAXRuntimeException;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

/**
 * Utility class for {@link DocumentBuilder}.
 *
 * @author higa
 */
public abstract class DocumentBuilderUtil {

    /**
     * Do not instantiate.
     */
    protected DocumentBuilderUtil() {
    }

    /**
     * Parses the XML.
     *

    /**
     * Unwrap credentials to a specific type.
     *
     * @param <T> the credential type to unwrap to
     * @param type the class of the credential type to unwrap to
     * @return instance for type, null if the type cannot be unwrapped
     */
    <T extends Credentials> T unwrap(Class<T> type);

    /**
     * Get the domain of the user account.
     * @return the domain the user account is in
     */

이제 `/v1/` 경로에 있는 모든 요청은 Flask 응용 프로그램에서 처리됩니다.

그리고 나머지는 **FastAPI**에 의해 처리됩니다.

실행하면 <a href="http://localhost:8000/v1/" class="external-link" target="_blank">http://localhost:8000/v1/</a>으로 이동해서 Flask의 응답을 볼 수 있습니다:

```txt
Hello, World from Flask!
```

그리고 다음으로 이동하면 <a href="http://localhost:8000/v2" class="external-link" target="_blank">http://localhost:8000/v2</a> Flask의 응답을 볼 수 있습니다:

```JSON
{
    "message": "Hello World"

        BlockingDeque.class,
        PriorityBlockingQueue.class,
        DelayQueue.class,
        SynchronousQueue.class,
        ConcurrentMap.class,
        ConcurrentNavigableMap.class,
        AtomicReference.class,
        AtomicBoolean.class,
        AtomicInteger.class,
        AtomicLong.class,
        AtomicDouble.class);
  }

          .put(NullPointerException.class, e -> e instanceof NullPointerException)
          .put(NumberFormatException.class, e -> e instanceof NumberFormatException)
          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(TimeoutException.class, e -> e instanceof TimeoutException)

          .put(NullPointerException.class, e -> e instanceof NullPointerException)
          .put(NumberFormatException.class, e -> e instanceof NumberFormatException)
          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(TimeoutException.class, e -> e instanceof TimeoutException)

          .put(NullPointerException.class, e -> e instanceof NullPointerException)
          .put(NumberFormatException.class, e -> e instanceof NumberFormatException)
          .put(RuntimeException.class, e -> e instanceof RuntimeException)
          .put(TimeoutException.class, e -> e instanceof TimeoutException)