public void testElapsed_notRunning() {
    ticker.advance(1);
    stopwatch.start();
    ticker.advance(4);
    stopwatch.stop();
    ticker.advance(9);
    assertEquals(4, stopwatch.elapsed(NANOSECONDS));
  }

  public void testElapsed_multipleSegments() {
    stopwatch.start();
    ticker.advance(9);
    stopwatch.stop();

    ticker.advance(16);

    stopwatch.start();

  private volatile long autoIncrementStepNanos;

  /** Advances the ticker value by {@code time} in {@code timeUnit}. */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  @CanIgnoreReturnValue
  public FakeTicker advance(long time, TimeUnit timeUnit) {
    return advance(timeUnit.toNanos(time));
  }

  /** Advances the ticker value by {@code nanoseconds}. */

			q = append([]AST{qual}, q...)
			st.advance(1)
		} else if len(st.str) > 1 && st.str[0] == 'D' {
			var qual AST
			switch st.str[1] {
			case 'x':
				qual = &Qualifier{Name: "transaction_safe"}
				st.advance(2)
			case 'o':
				qual = &Qualifier{Name: "noexcept"}
				st.advance(2)
			case 'O':
				st.advance(2)
				expr := st.expression()

  private volatile long autoIncrementStepNanos;

  /** Advances the ticker value by {@code time} in {@code timeUnit}. */
  @SuppressWarnings("GoodTime") // should accept a java.time.Duration
  @CanIgnoreReturnValue
  public FakeTicker advance(long time, TimeUnit timeUnit) {
    return advance(timeUnit.toNanos(time));
  }

  /** Advances the ticker value by {@code nanoseconds}. */

    if (IsSupportedTFLiteResourceOp(op)) return WalkResult::advance();
    if (IsSupportedTFLiteControlFlow(op)) return WalkResult::advance();

    if (IsSupportedTFCustomOp(op)) return WalkResult::advance();

    // Check for ops that are legalized to TFLite.
    if (op->getDialect()->getNamespace() == "tfl") {
      return WalkResult::advance();
    }
    // Check for ops that are not legalized to TFLite.

	// (4) Organize batchCursors in a min-heap, ordered by the timestamp of the next event for each M.
	// (5) Try to advance the next event for the M at the top of the min-heap.
	//   (a) On success, select that M.
	//   (b) On failure, sort the min-heap and try to advance other Ms. Select the first M that advances.
	//   (c) If there's nothing left to advance, goto (1).
	// (6) Select the latest event for the selected M and get it ready to be returned.

  public void testAdvance() {
    FakeTicker ticker = new FakeTicker();
    assertEquals(0, ticker.read());
    assertSame(ticker, ticker.advance(10));
    assertEquals(10, ticker.read());
    ticker.advance(1, TimeUnit.MILLISECONDS);
    assertEquals(1000010L, ticker.read());
    ticker.advance(Duration.ofMillis(1));
    assertEquals(2000010L, ticker.read());
  }

  public void testAutoIncrementStep_returnsSameInstance() {

                return new Iterator<Entry<String, String>>() {
                    Entry<String, String> next;

                    {
                        advance();
                    }

                    private void advance() {
                        next = null;
                        while (iterator.hasNext()) {
                            Entry<Object, Object> e = iterator.next();

  public void testAdvance() {
    FakeTicker ticker = new FakeTicker();
    assertEquals(0, ticker.read());
    assertSame(ticker, ticker.advance(10));
    assertEquals(10, ticker.read());
    ticker.advance(1, TimeUnit.MILLISECONDS);
    assertEquals(1000010L, ticker.read());
    ticker.advance(Duration.ofMillis(1));
    assertEquals(2000010L, ticker.read());
  }

  public void testAutoIncrementStep_returnsSameInstance() {

    if (op->getDialect() != tf_dialect) return WalkResult::advance();

    if (parallel_group_attr) {
      op->setAttr(TF::kParallelExecAnnotation, parallel_group_attr);
    }
    auto device_attr = op->getAttr(kDeviceAttr);
    if (!device_attr) {
      op->setAttr(kDeviceAttr, launch.getDeviceAttr());
      return WalkResult::advance();
    }