question: private void promoteInlineHandlerToReferenceHandler ( int newPageNumber ) throws IOException { int oldStartPage = _startPage ; BitSet oldPageNumbers = ( BitSet ) _pageNumbers . clone ( ) ; clearTableAndPages ( ) ; _tableBuffer . put ( getRowStart ( ) , MAP_TYPE_REFERENCE ) ; writeTable ( ) ; _handler = new ReferenceHandler ( ) ; reAddPages ( oldStartPage , oldPageNumbers , newPageNumber ) ; }
target:  Promotes and inline usage map to a reference usage map.