class PageList {

    boolean isLoaded( long pageRef )
    {
        return getFilePageId( pageRef ) != PageCursor.UNBOUND_PAGE_ID;
    }

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

}