question: public static void assertEntryAbsent ( SynonymMap synonynMap , String word ) throws IOException { word = word . replace ( ' ' , SynonymMap . WORD_SEPARATOR ) ; BytesRef value = Util . get ( synonynMap . fst , Util . toUTF32 ( new CharsRef ( word ) , new IntsRefBuilder ( ) ) ) ; assertNull ( "There should be no synonyms for: " + word , value ) ; }
target:  Validates that there are no synonyms for the given word.