checkNonnegative(occurrences, "occurrences");
    if (occurrences == 0) {
      return count(element);
    }
    int index = element.ordinal();
    int oldCount = counts[index];
    long newCount = (long) oldCount + occurrences;
    checkArgument(newCount <= Integer.MAX_VALUE, "too many occurrences: %s", newCount);
    counts[index] = (int) newCount;
    if (oldCount == 0) {
      distinctElements++;
    }

     * type.
     *
     * In practice, we are very unlikely to see `null`: The `WeakReference` to the enum constant
     * won't be cleared as long as the enum constant is referenced somewhere, and the enum constant
     * is referenced somewhere for as long as the enum class is loaded. *Maybe in theory* the enum
     * class could be unloaded after the above call to `getEnumConstants` but before we call

  }

  public void testEmptyArrayToEmpty() {
    doTestNewArrayEquals(new Object[0], 0);
  }

  public void testEmptyArrayToNonEmpty() {
    checkArrayEquals(new Long[5], ObjectArrays.newArray(new Long[0], 5));
  }

  public void testNonEmptyToShorter() {
    checkArrayEquals(new String[9], ObjectArrays.newArray(new String[10], 9));
  }

  public void testNonEmptyToSameLength() {

    assertThat(top.topK()).containsExactly("a", "B", "c").inOrder();
  }

  public void testWorstCase() {
    int n = 2000000;
    int k = 200000;
    final long[] compareCalls = {0};
    Comparator<Integer> cmp =
        new Comparator<Integer>() {
          @Override
          public int compare(Integer o1, Integer o2) {
            compareCalls[0]++;

      return delegate.rowKeySet();
    }

    @Override
    public Map<R, Map<C, V>> rowMap() {
      assertTrue(Thread.holdsLock(mutex));
      return delegate.rowMap();
    }

    private static final long serialVersionUID = 0;
  }

  @Override
  protected Table<String, Integer, Character> create(@Nullable Object... data) {
    TestTable<String, Integer, Character> table = new TestTable<>();

   * provide a non-nullable {@code cause}, as many users expect to find one.
   */
  public ExecutionError(@CheckForNull Error cause) {
    super(cause);
  }

  private static final long serialVersionUID = 0;

  //    the initial write (just stronger guarantees if it does).
  //
  // See: http://cs.oswego.edu/pipermail/concurrency-interest/2015-January/013800.html
  // For a (long) discussion about this specific issue and the general futility of life.
  //
  // For the time being we are OK with the problem discussed above since it requires a caller to

      setMap(map);
    }

    @GwtIncompatible // java serialization not supported
    @J2ktIncompatible
    private static final long serialVersionUID = 0;
  }

  /**
   * Creates a new {@code ListMultimap} that uses the provided map and factory. It can generate a
   * multimap based on arbitrary {@link Map} and {@link List} classes.
   *

  }

  private static class SomeIterable implements Iterable<Integer>, Serializable {
    @Override
    public Iterator<Integer> iterator() {
      return SOME_COLLECTION.iterator();
    }

    private static final long serialVersionUID = 0;
  }

  private static final List<Integer> SOME_LIST = Lists.newArrayList(1, 2, 3, 4);

  private static final List<Integer> SOME_SEQUENTIAL_LIST = Lists.newLinkedList(asList(1, 2, 3, 4));

    final Object value;

    IncomparableValueException(Object value) {
      super("Cannot compare value: " + value);
      this.value = value;
    }

    private static final long serialVersionUID = 0;
  }

  // Never make these public
  static final int LEFT_IS_GREATER = 1;
  static final int RIGHT_IS_GREATER = -1;