class PageList {

    int toId( long pageRef )
    {
        // >> 5 is equivalent to dividing by 32, META_DATA_BYTES_PER_PAGE.
        return (int) ((pageRef - baseAddress) >> 5);
    }

      PageList( int pageCount, int cachePageSize, MemoryAllocator memoryAllocator, SwapperSet swappers,
              long victimPageAddress, long bufferAlignment );
      PageList( PageList pageList );

}