*
   * The deadline to respond to this ping attempts to limit the cost of being wrong. If it is too
   * long, streams created while we await the pong will reuse broken connections and inevitably
   * fail. If it is too short, slow connections will be marked as failed and extra TCP and TLS
   * handshakes will be required.
   *
   * The deadline is currently hardcoded. We may make this configurable in the future!

		resetBuildClauses = true
	}

	if optimizer, ok := stmt.Dest.(StatementModifier); ok {
		optimizer.ModifyStatement(stmt)
	}

	if db.DefaultContextTimeout > 0 {
		if _, ok := stmt.Context.Deadline(); !ok {
			stmt.Context, _ = context.WithTimeout(stmt.Context, db.DefaultContextTimeout)
		}
	}

	// assign model values
	if stmt.Model == nil {
		stmt.Model = stmt.Dest
	} else if stmt.Dest == nil {

type bgCtx struct {
	parent context.Context
}

func (a bgCtx) Done() <-chan struct{} {
	return nil
}

func (a bgCtx) Err() error {
	return nil
}

func (a bgCtx) Deadline() (deadline time.Time, ok bool) {
	return time.Time{}, false
}

func (a bgCtx) Value(key any) any {
	return a.parent.Value(key)

      } finally {
        lock.unlock();
      }
    }

    @Override
    public boolean awaitUntil(Date deadline) throws InterruptedException {
      lock.lock();
      try {
        return condition.awaitUntil(deadline);
      } finally {
        lock.unlock();
      }
    }

    @Override
    public void signal() {
      lock.lock();
      try {

    // Call 1: set a deadline on the response body.
    val request1 = Request.Builder().url(server.url("/")).build()
    val response1 = client.newCall(request1).execute()
    val body1 = response1.body.source()
    assertThat(body1.readUtf8()).isEqualTo("abc")
    body1.timeout().deadline(5, TimeUnit.SECONDS)

    // Call 2: check for the absence of a deadline on the request body.

pkg bufio, method (*Reader) Read([]uint8) (int, error)
pkg bufio, method (*Reader) ReadByte() (uint8, error)
pkg bufio, method (*Reader) ReadBytes(uint8) ([]uint8, error)
pkg bufio, method (*Reader) ReadLine() ([]uint8, bool, error)
pkg bufio, method (*Reader) ReadRune() (int32, int, error)
pkg bufio, method (*Reader) ReadSlice(uint8) ([]uint8, error)
pkg bufio, method (*Reader) ReadString(uint8) (string, error)

 *       Future} is "completed" even if it is cancelled while its underlying work continues on a
 *       thread, an RPC, etc. The {@code Future} is also "completed" if it fails "early" -- for
 *       example, if the deadline expires on a {@code Future} returned from {@link
 *       Futures#withTimeout} while the {@code Future} it wraps continues its underlying work. So

  // * We want to behave reasonably for timeouts of 0
  // * We are more responsive to completion than timeouts. This is because parkNanos depends on
  //   system scheduling and as such we could either miss our deadline, or unpark() could be delayed
  //   so that it looks like we timed out even though we didn't. For comparison FutureTask respects
  //   completion preferably and AQS is non-deterministic (depends on where in the queue the waiter

  // * We want to behave reasonably for timeouts of 0
  // * We are more responsive to completion than timeouts. This is because parkNanos depends on
  //   system scheduling and as such we could either miss our deadline, or unpark() could be delayed
  //   so that it looks like we timed out even though we didn't. For comparison FutureTask respects
  //   completion preferably and AQS is non-deterministic (depends on where in the queue the waiter

		opt *sql.TxOptions
		err error
	)

	if len(opts) > 0 {
		opt = opts[0]
	}

	ctx := tx.Statement.Context
	if db.DefaultTransactionTimeout > 0 {
		if _, ok := ctx.Deadline(); !ok {
			ctx, _ = context.WithTimeout(ctx, db.DefaultTransactionTimeout)
		}
	}

	switch beginner := tx.Statement.ConnPool.(type) {
	case TxBeginner: