The **FastAPI Extension** is available for both [VS Code](https://code.visualstudio.com/) and [Cursor](https://www.cursor.com/). It can be installed directly from the Extensions panel in each editor by searching for "FastAPI" and selecting the extension published by **FastAPI Labs**. The extension also works in browser-based editors such as [vscode.dev](https://vscode.dev) and [github.dev](https://github.dev).

### Application Discovery { #application-discovery }

   * selecting the {@code VarHandleAtomicHelper} strategy.
   */
  private static final ClassLoader NO_VAR_HANDLE =
      getClassLoader(ImmutableSet.of("java.lang.invoke.VarHandle"));

  /**
   * This classloader disallows {@link java.lang.invoke.VarHandle} and {@link sun.misc.Unsafe},
   * which will prevent us from selecting the {@code UnsafeAtomicHelper} strategy.
   */

   * selecting the {@code VarHandleAtomicHelper} strategy.
   */
  private static final ClassLoader NO_VAR_HANDLE =
      getClassLoader(ImmutableSet.of("java.lang.invoke.VarHandle"));

  /**
   * This classloader disallows {@link java.lang.invoke.VarHandle} and {@link sun.misc.Unsafe},
   * which will prevent us from selecting the {@code UnsafeAtomicHelper} strategy.
   */

   * // counters.
   * ListenableFuture<Integer> faultTolerantFuture =
   *     fetchCounters().catching(FetchException.class, x -> 0, directExecutor());
   * }
   *
   * <p>When selecting an executor, note that {@code directExecutor} is dangerous in some cases. See
   * the discussion in the {@link #addListener} documentation. All its warnings about heavyweight

public class AggregateFutureStateFallbackAtomicHelperTest extends TestCase {

  /**
   * This classloader disallows {@code AtomicReferenceFieldUpdater} and {@code
   * AtomicIntegerFieldUpdater}, which will prevent us from selecting the {@code SafeAtomicHelper}
   * strategy.
   *
   * <p>Stashing this in a static field avoids loading it over and over again and speeds up test
   * execution significantly.
   */

public class AggregateFutureStateFallbackAtomicHelperTest extends TestCase {

  /**
   * This classloader disallows {@code AtomicReferenceFieldUpdater} and {@code
   * AtomicIntegerFieldUpdater}, which will prevent us from selecting the {@code SafeAtomicHelper}
   * strategy.
   *
   * <p>Stashing this in a static field avoids loading it over and over again and speeds up test
   * execution significantly.
   */

   * // processing the RPC to fetch counters.
   * ListenableFuture<Integer> faultTolerantFuture = Futures.catching(
   *     fetchCounterFuture, FetchException.class, x -> 0, directExecutor());
   * }
   *
   * <p>When selecting an executor, note that {@code directExecutor} is dangerous in some cases. See
   * the warnings the {@link MoreExecutors#directExecutor} documentation.
   *
   * @param input the primary input {@code Future}

  /**
   * Adds the {@code Runnable} and accompanying {@code Executor} to the list of listeners to
   * execute. If execution has already begun, the listener is executed immediately.
   *
   * <p>When selecting an executor, note that {@code directExecutor} is dangerous in some cases. See
   * the discussion in the {@link ListenableFuture#addListener ListenableFuture.addListener}
   * documentation.
   */

import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.Nullable;

/**
 * Creates, based on your criteria, a JUnit test suite that exhaustively tests the object generated
 * by a G, selecting appropriate tests by matching them against specified features.
 *
 * @param <B> The concrete type of this builder (the 'self-type'). All the Builder methods of this

import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.Nullable;

/**
 * Creates, based on your criteria, a JUnit test suite that exhaustively tests the object generated
 * by a G, selecting appropriate tests by matching them against specified features.
 *
 * @param <B> The concrete type of this builder (the 'self-type'). All the Builder methods of this