return null;
    }
    alertListenerIfPresent(key, oldValue.getValue(), RemovalCause.REPLACED);
    return oldValue.getValue();
  }

  @CanIgnoreReturnValue
  @Override
  public V remove(Object key) {
    Timestamped<V> stamped = cachingHashMap.remove(key);
    if (stamped != null) {
      V value = stamped.getValue();
      // `key` was in the cache, so it's a K.

      int columnIndex = requireNonNull(columnKeyToIndex.get(columnKey));
      V existingValue = values[rowIndex][columnIndex];
      checkNoDuplicate(rowKey, columnKey, existingValue, cell.getValue());
      values[rowIndex][columnIndex] = cell.getValue();
      rowCounts[rowIndex]++;
      columnCounts[columnIndex]++;
      cellRowIndices[i] = rowIndex;
      cellColumnIndices[i] = columnIndex;
    }

                    for (Entry<String, String> entry : entries) {
                      checkArgument(!bimap.containsKey(entry.getKey()));
                      bimap.put(entry.getKey(), entry.getValue());
                    }
                    return Maps.unmodifiableBiMap(bimap);
                  }
                })
            .named("unmodifiableBiMap[HashBiMap]")
            .withFeatures(

        checkNotNull(entry.getKey());
        checkNotNull(entry.getValue());
        @SuppressWarnings("unchecked") // all supported methods are covariant
        Entry<K, V> immutableEntry = (Entry<K, V>) entry;
        entries.add(immutableEntry);
      } else {
        entries.add(entryOf((K) entry.getKey(), (V) entry.getValue()));
      }
      return this;
    }

    @CanIgnoreReturnValue

    @Override
    @ParametricNullness
    public K getValue() {
      updateIndex();
      // For discussion of unsafeNull() and uncheckedCastNullableTToT(), see EntryForKey.getValue().
      return (index == ABSENT) ? unsafeNull() : uncheckedCastNullableTToT(biMap.keys[index]);
    }

    @Override
    @ParametricNullness
    public K setValue(@ParametricNullness K key) {
      updateIndex();

      for (Entry<K, V> entry : entrySet) {
        assertTrue(map.containsKey(entry.getKey()));
        assertTrue(map.containsValue(entry.getValue()));
        int expectedHash =
            (entry.getKey() == null ? 0 : entry.getKey().hashCode())
                ^ (entry.getValue() == null ? 0 : entry.getValue().hashCode());
        assertEquals(expectedHash, entry.hashCode());
        expectedEntrySetHash += expectedHash;
      }

                        @Override
                        public String setValue(String value) {
                          checkNotNull(value);
                          return next.setValue(value);
                        }

                        @Override
                        public String getValue() {
                          return next.getValue();
                        }

                        @Override

  }

  // https://youtrack.jetbrains.com/issue/KT-58242/. Crash when getValue result (null) is unboxed
  @J2ktIncompatible
  public void testToTableNullValues() {
    Collector<Cell<String, String, Integer>, ?, Table<String, String, Integer>> collector =
        TableCollectors.toTable(
            Cell::getRowKey,
            Cell::getColumnKey,
            Cell::getValue,
            () -> {

                        @Override
                        public String setValue(String value) {
                          checkNotNull(value);
                          return next.setValue(value);
                        }

                        @Override
                        public String getValue() {
                          return next.getValue();
                        }

                        @Override

        assertSame(entry.getValue(), cache.asMap().putIfAbsent(entry.getKey(), newValue));
        Object newKey = new Object();
        assertNull(cache.asMap().putIfAbsent(newKey, entry.getValue()));
        // this getUnchecked() call shouldn't be a cache miss; verified below
        assertEquals(entry.getValue(), cache.getUnchecked(entry.getKey()));
        assertEquals(entry.getValue(), cache.getUnchecked(newKey));