mask = resizeTable(mask, CompactHashing.newCapacity(mask), hash, newEntryIndex);
      } else {
        entries[entryIndex] = CompactHashing.maskCombine(entry, newEntryIndex + 1, mask);
      }
    }
    resizeMeMaybe(newSize);
    insertEntry(newEntryIndex, key, value, hash, mask);
    this.size = newSize;
    incrementModCount();
    return null;
  }

  /**