}
  }

  /** A special value to represent cancellation and the 'wasInterrupted' bit. */
  private static final class Cancellation {
    // constants to use when GENERATE_CANCELLATION_CAUSES = false
    @CheckForNull static final Cancellation CAUSELESS_INTERRUPTED;
    @CheckForNull static final Cancellation CAUSELESS_CANCELLED;

    static {
      if (GENERATE_CANCELLATION_CAUSES) {

    }
  }

  /** A special value to represent cancellation and the 'wasInterrupted' bit. */
  private static final class Cancellation {
    // constants to use when GENERATE_CANCELLATION_CAUSES = false
    @CheckForNull static final Cancellation CAUSELESS_INTERRUPTED;
    @CheckForNull static final Cancellation CAUSELESS_CANCELLED;

    static {
      if (GENERATE_CANCELLATION_CAUSES) {

                // This notifies the cancellation handler that a worker daemon has been in use during this build session.  If the
                // build session is cancelled, we can't guarantee that all worker daemons are in a safe state, so the cancellation
                // handler will stop any long-lived worker daemons.  If a worker is not used during this session (i.e. this method

import org.junit.jupiter.api.Test;
import org.mockito.Mockito;

import static org.junit.jupiter.api.Assertions.assertThrows;

class SimplexTransferListenerTest {
    @Test
    void cancellation() throws InterruptedException {
        TransferListener delegate = new TransferListener() {
            @Override
            public void transferInitiated(TransferEvent event) throws TransferCancelledException {

The [DNSError] type now wraps errors caused by timeouts or cancellation.
For example, `errors.Is(someDNSErr, context.DeadlineExceedeed)`

 * Futures#transform(ListenableFuture, Function, Executor) Futures.transform}, but you will often
 * find it easier to use a framework. Frameworks automate the process, often adding features like
 * monitoring, debugging, and cancellation. Examples of frameworks include:
 *
 * <ul>
 *   <li><a href="https://dagger.dev/producers.html">Dagger Producers</a>
 * </ul>
 *

	}
	c := &cancelCtx{}
	c.propagateCancel(parent, c)
	return c
}

// Cause returns a non-nil error explaining why c was canceled.
// The first cancellation of c or one of its parents sets the cause.
// If that cancellation happened via a call to CancelCauseFunc(err),
// then [Cause] returns err.
// Otherwise Cause(c) returns the same value as c.Err().
// Cause returns nil if c has not been canceled yet.

 * Futures#transform(ListenableFuture, Function, Executor) Futures.transform}, but you will often
 * find it easier to use a framework. Frameworks automate the process, often adding features like
 * monitoring, debugging, and cancellation. Examples of frameworks include:
 *
 * <ul>
 *   <li><a href="https://dagger.dev/producers.html">Dagger Producers</a>
 * </ul>
 *

        .that(step3.statusFuture().isCancelled())
        .isTrue();
    // Its closeable is still open.
    assertStillOpen(closeable3);

    // Step 4 is not cancelled, because it caught the cancellation.
    assertWithMessage("step4.statusFuture().isCancelled()")
        .that(step4.statusFuture().isCancelled())
        .isFalse();
    // Its closeable isn't closed yet.
    assertStillOpen(closeable4);

        .that(step3.statusFuture().isCancelled())
        .isTrue();
    // Its closeable is still open.
    assertStillOpen(closeable3);

    // Step 4 is not cancelled, because it caught the cancellation.
    assertWithMessage("step4.statusFuture().isCancelled()")
        .that(step4.statusFuture().isCancelled())
        .isFalse();
    // Its closeable isn't closed yet.
    assertStillOpen(closeable4);