assertTrue(
          "ExecutorService did not terminate in a timely manner",
          exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
    } catch (SecurityException ok) {
      // Allowed in case test doesn't have privs
    } catch (InterruptedException ie) {
      fail("Unexpected InterruptedException");
    }
  }

  /**
   * Checks that thread does not terminate within the default millisecond delay of {@code

   * Such a sequence is referred to as "text." STX may be used to terminate a sequence of characters
   * started by SOH.
   *
   * @since 8.0
   */
  public static final byte STX = 2;

  /**
   * End of Text: A communication control character used to terminate a sequence of characters
   * started with STX and transmitted as an entity.
   *
   * @since 8.0
   */

      assertTrue(
          "ExecutorService did not terminate in a timely manner",
          exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS));
    } catch (SecurityException ok) {
      // Allowed in case test doesn't have privs
    } catch (InterruptedException ie) {
      fail("Unexpected InterruptedException");
    }
  }

  /**
   * Checks that thread does not terminate within the default millisecond delay of {@code

      or a Contribution incorporated within the Work constitutes direct
      or contributory patent infringement, then any patent licenses
      granted to You under this License for that Work shall terminate
      as of the date such litigation is filed.

   4. Redistribution. You may reproduce and distribute copies of the
      Work or Derivative Works thereof in any medium, with or without

   * may not occur at all. However, despite these limitations,
   * observed contention rates are typically low in these cases.
   *
   * It is possible for a Cell to become unused when threads that
   * once hashed to it terminate, as well as in the case where
   * doubling the table causes no thread to hash to it under
   * expanded mask.  We do not try to detect or remove such cells,
   * under the assumption that for long-running instances, observed

            "Called my toString",
            new AsyncCallable<String>() {
              @Override
              public ListenableFuture<String> call() throws Exception {
                // Make this executor terminate after this task so that the test can tell when
                // futureResult has received resultOfCombiner.
                executor.shutdown();
                callableBlocking.await();

        if (sneaky == null) {
          return sample;
        } else {
          /* Someone beat us to it! Trying again...
           *
           * Technically this loop not guaranteed to terminate, so theoretically (extremely
           * unlikely) this thread might starve, but even then, there is always going to be another
           * thread doing progress here.
           */
        }
      }
    }

   * This is useful if the given service uses daemon threads, and we want to keep the JVM from
   * exiting immediately on shutdown, instead giving these daemon threads a chance to terminate
   * normally.
   *
   * @param service ExecutorService which uses daemon threads
   * @param terminationTimeout how long to wait for the executor to finish before terminating the
   *     JVM

   * may not occur at all. However, despite these limitations,
   * observed contention rates are typically low in these cases.
   *
   * It is possible for a Cell to become unused when threads that
   * once hashed to it terminate, as well as in the case where
   * doubling the table causes no thread to hash to it under
   * expanded mask.  We do not try to detect or remove such cells,
   * under the assumption that for long-running instances, observed

            @Override
            public FileVisitResult postVisitDirectory(Path dir, IOException exc)
                throws IOException {
              if (exc != null) {
                return FileVisitResult.TERMINATE;
              }
              Files.deleteIfExists(dir);
              return FileVisitResult.CONTINUE;
            }
          });
    }
  }

  private Path createTempFile() throws IOException {