concatenate all values of the value/name map concode_field_sep PlaceHolder placeHolder concode_field_sep void checkArtistDirectory concode_elem_sep String pathEscape concode_elem_sep int determineNumberOfAlbumDigits concode_elem_sep void checkAlbumDirectory concode_elem_sep void check concode_elem_sep void checkFilename
String function ( Map < String , Set < String >> arg0 ) { if ( ( arg0 == null ) || arg0 . isEmpty ( ) ) { return null ; } ArrayList < String > loc0 = new ArrayList < > ( arg0 . keySet ( ) ) ; return TagUtils . concatenateTagValues ( loc0 , null ) ; }