long remainingNanos = unit.toNanos(timeout);
      long end = System.nanoTime() + remainingNanos;

      while (true) {
        try {
          // CountDownLatch treats negative timeouts just like zero.
          return latch.await(remainingNanos, NANOSECONDS);
        } catch (InterruptedException e) {
          interrupted = true;
          remainingNanos = end - System.nanoTime();
        }
      }
    } finally {

    if (isJdk9OrHigher()) {
      return;
    }
    SecurityManager oldSecurityManager = System.getSecurityManager();
    try {
      System.setSecurityManager(null);
      doTestUnloadable();
    } finally {
      System.setSecurityManager(oldSecurityManager);
    }
  }

  /**

        checkScopeUpdate(Artifact.SCOPE_RUNTIME, Artifact.SCOPE_SYSTEM, Artifact.SCOPE_SYSTEM);
        checkScopeUpdate(Artifact.SCOPE_RUNTIME, Artifact.SCOPE_TEST, Artifact.SCOPE_RUNTIME);

        /* farthest = system */
        checkScopeUpdate(Artifact.SCOPE_SYSTEM, Artifact.SCOPE_COMPILE, Artifact.SCOPE_COMPILE);
        checkScopeUpdate(Artifact.SCOPE_SYSTEM, Artifact.SCOPE_PROVIDED, Artifact.SCOPE_PROVIDED);

            forEachJavaProcess(psOutput, commandLineArgsPattern, (pid, line) -> {
                System.out.println("Killing Gradle process with PID " + pid + ": " + line);
                pkill(pid);
            });
        } else {
            forEachLeakingJavaProcess(rootProjectDir, (pid, line) -> {

            offset += 2;
            System.arraycopy(domain, 0, targetInfo, offset, domainLength);
            offset += domainLength;
        }
        if ( serverLength > 0 ) {
            writeUShort(targetInfo, offset, 1);
            offset += 2;
            writeUShort(targetInfo, offset, serverLength);
            offset += 2;
            System.arraycopy(server, 0, targetInfo, offset, serverLength);
        }

        try ( SmbResource f = getDefaultShareRoot() ) {
            f.getDiskFreeSpace();
        }
    }


    public void assertCloseTime ( long timeMs ) {
        if ( timeMs - System.currentTimeMillis() > 5 * 60 * 1000L ) {
            assertTrue("Time is not within 30s, check clocks " + new Date(timeMs), false);
        }
    }


    @Test

         * So this is probably just the "Windows Java 8" case. In that case, if we wanted *another*
         * layer of fallback before consulting the system property, we could try
         * com.sun.security.auth.module.NTSystem.
         *
         * But for now, we use the value from the system property as our best guess.
         */
        return fromSystemProperty;
      } catch (InvocationTargetException e) {

                scopes = Arrays.asList(
                        Artifact.SCOPE_COMPILE, Artifact.SCOPE_SYSTEM, Artifact.SCOPE_PROVIDED, Artifact.SCOPE_RUNTIME);
            } else if (Artifact.SCOPE_RUNTIME_PLUS_SYSTEM.equals(classpath)) {
                scopes = Arrays.asList(Artifact.SCOPE_COMPILE, Artifact.SCOPE_SYSTEM, Artifact.SCOPE_RUNTIME);
            } else if (Artifact.SCOPE_TEST.equals(classpath)) {

    @Nonnull
    Map<String, String> getUserProperties();

    /**
     * Returns immutable system properties to use for interpolation. The system properties are collected from the
     * runtime environment such as {@link System#getProperties()} and environment variables
     * (prefixed with {@code env.}).
     *
     * @return the system properties, never {@code null}
     */
    @Nonnull
    Map<String, String> getSystemProperties();

      assertFalse(MoreFiles.isRegularFile(NOFOLLOW_LINKS).apply(symlinkToFile));
    }
  }

  /**
   * Creates a new file system for testing that supports the given features in addition to
   * supporting symbolic links. The file system is created initially having the following file
   * structure:
   *
   * <pre>
   *   /
   *      work/
   *         dir/
   *            a