#vulnerable code 
                                private static <K, V> V getSingleValue(Map<K, V> map) {
        return getSingle(map.entrySet()).getValue();
    } 
                            #location 2 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                private static <K, V> V getSingleValue(Map<K, V> map) {
        return getSingleOrNull(map.entrySet()).getValue();
    }