return method.getName().startsWith("enter") || method.getName().startsWith("tryEnter");
  }

  /** Identifies just tryEnterXxx methods (a subset of {@link #isAnyEnter}), which never block. */
  private static boolean isTryEnter(Method method) {
    return method.getName().startsWith("tryEnter");
  }

  /**

    manager.addListener(
        new ServiceManager.Listener() {
          @Override
          public void failure(Service service) {
            failEnter.countDown();
            // block until after the service manager is shutdown
            Uninterruptibles.awaitUninterruptibly(failLeave);
          }
        },
        directExecutor());
    manager.startAsync();
    afterStarted.countDown();

pkg encoding/pem, func Decode([]uint8) (*Block, []uint8)
pkg encoding/pem, func Encode(io.Writer, *Block) error
pkg encoding/pem, func EncodeToMemory(*Block) []uint8
pkg encoding/pem, type Block struct
pkg encoding/pem, type Block struct, Bytes []uint8
pkg encoding/pem, type Block struct, Headers map[string]string
pkg encoding/pem, type Block struct, Type string
pkg encoding/xml, const Header ideal-string

                transitionTo(State.HALF_OPEN);
                currentState = State.HALF_OPEN;
            }

            // Block if circuit is open
            if (currentState == State.OPEN) {
                totalRequests.incrementAndGet();
                totalCircuitOpenRejections.incrementAndGet();
                rollingWindow.recordFailure();

          }
        };
    f.set("foo");
  }

  // Regression test for a case where we would fail to execute listeners immediately on done futures
  // this would be observable from a waiter that was just unblocked.
  public void testListenersExecuteImmediately_afterWaiterWakesUp() throws Exception {
    AbstractFuture<String> f =
        new AbstractFuture<String>() {
          @Override

				// zip writer only handles one concurrent write
				writeMu.Lock()
				profilingDataFound = true
				err := embedFileInZip(zipWriter, fmt.Sprintf("profile-%s-%s", client.host.String(), typ), data, 0o600)
				writeMu.Unlock()
				if err != nil {
					reqInfo := (&logger.ReqInfo{}).AppendTags("peerAddress", client.host.String())
					ctx := logger.SetReqInfo(ctx, reqInfo)
					peersLogOnceIf(ctx, err, client.host.String())
				}
			}

      }
    }
  }

  /**
   * Test for 2-bit characteristics. A characteristic is a delta in the input which is repeated in
   * the output. For example, if f() is a block cipher and c is a characteristic, then f(x^c) =
   * f(x)^c with greater than expected probability. The test for funneling is merely a test for
   * 1-bit characteristics.
   *

	z.serverPools[0].erasureDisksMu.Lock()
	er.getDisks = func() []StorageAPI {
		erasureDisks[ridx] = newNaughtyDisk(erasureDisks[ridx], nil, errFaultyDisk)
		return erasureDisks
	}
	z.serverPools[0].erasureDisksMu.Unlock()

	uploadIDs = append(uploadIDs, res.UploadID)

	// Create multipart parts.
	// Need parts to be uploaded before MultipartLists can be called and tested.
	createPartCases := []struct {

 * that provide streams that are:
 *
 * <ul>
 *   <li><b>Finite:</b> Many operations, such as {@link #size()} and {@link #read()}, will either
 *       block indefinitely or fail if the source creates an infinite stream.
 *   <li><b>Non-destructive:</b> A <i>destructive</i> stream will consume or otherwise alter the

When you declare a *path operation function* with normal `def` instead of `async def`, it is run in an external threadpool that is then awaited, instead of being called directly (as it would block the server).