question: private static String convertRelevance ( int relevance ) { StringBuilder sb = new StringBuilder ( ) ; while ( relevance > 0 ) { sb . insert ( 0 , REVERSE_CHAR_MAP [ relevance % 10 ] ) ; relevance = relevance / 10 ; } return sb . toString ( ) ; }
target:  Converts the relevance to a sort text. Uses a reverse character map to convert digits to text.