latch.countDown();
    }

    boolean awaitClosed() {
      return awaitUninterruptibly(latch, 10, SECONDS);
    }

    boolean stillOpen() {
      return !awaitUninterruptibly(latch, 1, SECONDS);
    }

    @Override
    public String toString() {
      return name;
    }
  }

  static final class Waiter {

     *
     * @see java.util.Iterator#hasNext()
     */
    @Override
    public boolean hasNext() {
        return false;
    }

    /**
     * {@inheritDoc}
     *
     * @see java.util.Iterator#next()
     */
    @Override
    public SmbResource next() {
        return null;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.CloseableIterator#close()
     */
    @Override

  pass


def is_windows():
  return platform.system() == 'Windows'


def is_linux():
  return platform.system() == 'Linux'


def is_macos():
  return platform.system() == 'Darwin'


def is_ppc64le():
  return platform.machine() == 'ppc64le'


def is_s390x():
  return platform.machine() == 's390x'


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

    @Override public MediaType contentType() {
      return responseBody.contentType();
    }

    @Override public long contentLength() {
      return responseBody.contentLength();
    }

    @Override public BufferedSource source() {
      if (bufferedSource == null) {
        bufferedSource = Okio.buffer(source(responseBody.source()));
      }
      return bufferedSource;
    }

      if (type == boolean.class) {
        return (T) Boolean.FALSE;
      } else if (type == char.class) {
        return (T) Character.valueOf('\0');
      } else if (type == byte.class) {
        return (T) Byte.valueOf((byte) 0);
      } else if (type == short.class) {
        return (T) Short.valueOf((short) 0);
      } else if (type == int.class) {
        return (T) Integer.valueOf(0);
      } else if (type == long.class) {

  }

  char getLeafNodeCode() {
    return leafNodeCode;
  }

  char getInnerNodeCode() {
    return innerNodeCode;
  }

  /** Returns a PublicSuffixType of the right type according to the given code */
  static PublicSuffixType fromCode(char code) {
    for (PublicSuffixType value : values()) {
      if (value.getInnerNodeCode() == code || value.getLeafNodeCode() == code) {
        return value;
      }
    }

	return tx
}

// InstanceGet get value with key from current db instance's context
func (db *DB) InstanceGet(key string) (interface{}, bool) {
	return db.Statement.Settings.Load(fmt.Sprintf("%p", db.Statement) + key)
}

// Callback returns callback manager
func (db *DB) Callback() *callbacks {
	return db.callbacks
}

// AddError add error to db

   */
  public abstract String escape(String string);

  private final Function<String, String> asFunction = this::escape;

  /** Returns a {@link Function} that invokes {@link #escape(String)} on this escaper. */
  public final Function<String, String> asFunction() {
    return asFunction;
  }

        byte[] first = impl.getBuffer(); // should return slot 0 -> a
        byte[] second = impl.getBuffer(); // then slot 1 -> c
        byte[] third = impl.getBuffer(); // cache empty -> new with size 3

        assertSame(a, first, "First get should return first cached buffer");
        assertSame(c, second, "Second get should return second cached buffer");

 * (except `hashCode` and `equals`) if the provided `Supplier` returns false.
 */
final class InvalidatableSet<E> extends ForwardingSet<E> {
  private final Supplier<Boolean> validator;
  private final Set<E> delegate;
  private final Supplier<String> errorMessage;

  static <E> InvalidatableSet<E> of(
      Set<E> delegate, Supplier<Boolean> validator, Supplier<String> errorMessage) {
    return new InvalidatableSet<>(