def is_cygwin():
  return platform.system().startswith('CYGWIN_NT')


def get_input(question):
  try:
    try:
      answer = raw_input(question)
    except NameError:
      answer = input(question)  # pylint: disable=bad-builtin
  except EOFError:
    answer = ''
  return answer


def symlink_force(target, link_name):
  """Force symlink, equivalent of 'ln -sf'.

  Args:
    target: items to link to.

For any non-trivial change, we need to be able to answer these questions:

* Why is this change done? What's the use case?
* For user-facing features, what will the API look like?
* What test cases should it have? What could go wrong?
* How will it roughly be implemented? We'll happily provide code pointers to save you time.

  }

  /**
   * This test creates a long random sequence of inputs, then a lot of differently configured sinks
   * process it; all should produce the same answer, the only difference should be the number of
   * process()/processRemaining() invocations, due to alignment.
   */
  @AndroidIncompatible // slow. TODO(cpovirk): Maybe just reduce iterations under Android.

        batches.add(new String[] { "c" }); // second batch
        batches.add(new String[] {}); // last -> NO_MORE_FILES

        // send() answer that mutates the provided response
        when(tree.send(any(Trans2FindFirst2.class), any(Trans2FindFirst2Response.class))).thenAnswer((InvocationOnMock inv) -> {
            Trans2FindFirst2Response resp = inv.getArgument(1);

Если Вам ответили, велика вероятность, что Вы решили их проблему, поздравляю, **Вы — герой**! 🦸

* Теперь, если проблема решена, можно попросить их:
    * В GitHub Discussions: пометить комментарий как **answer** (ответ).
    * В GitHub Issues: **закрыть** Issue.

## Отслеживать репозиторий на GitHub { #watch-the-github-repository }

          }
        });
  }

  /**
   * An immutable snapshot of the current state of the service. This class represents a consistent
   * snapshot of the state and therefore it can be used to answer simple queries without needing to
   * grab a lock.
   */
  // @Immutable except that Throwable is mutable (initCause(), setStackTrace(), mutable subclasses).
  private static final class StateSnapshot {
    /**

    }

    Ordering<Object> arbitrary = Ordering.arbitrary();
    sort(list, arbitrary);

    // Now we don't care what order it's put the list in, only that
    // comparing any pair of elements gives the answer we expect.
    testComparator(arbitrary, list);

    assertEquals("Ordering.arbitrary()", arbitrary.toString());
  }

  @J2ktIncompatible // ArbitraryOrdering
  public void testArbitrary_withCollisions() {

    }

    Ordering<Object> arbitrary = Ordering.arbitrary();
    sort(list, arbitrary);

    // Now we don't care what order it's put the list in, only that
    // comparing any pair of elements gives the answer we expect.
    testComparator(arbitrary, list);

    assertEquals("Ordering.arbitrary()", arbitrary.toString());
  }

  @J2ktIncompatible // ArbitraryOrdering
  public void testArbitrary_withCollisions() {

   * We already know how much time it takes to serve 3 fresh permits: if the rate is
   * "1 token per second", then this will take 3 seconds. But what does it mean to serve 7 stored
   * permits? As explained above, there is no unique answer. If we are primarily interested to deal
   * with underutilization, then we want stored permits to be given out /faster/ than fresh ones,
   * because underutilization = free resources for the taking. If we are primarily interested to

          }
        });
  }

  /**
   * An immutable snapshot of the current state of the service. This class represents a consistent
   * snapshot of the state and therefore it can be used to answer simple queries without needing to
   * grab a lock.
   */
  // @Immutable except that Throwable is mutable (initCause(), setStackTrace(), mutable subclasses).
  private static final class StateSnapshot {
    /**