question: public static String cleanFolderStackingMarkers ( String filename ) { if ( ! StringUtils . isEmpty ( filename ) ) { Matcher m = folderStackingPattern . matcher ( filename ) ; if ( m . matches ( ) ) { return m . group ( 1 ) + m . group ( 3 ) ; } } return filename ; }
target:  Clean stacking markers.<br> Same logic as detection, but just returning string w/o