#vulnerable code 
                                @Override
    public void set(String key, String value) {
        Jboot.getJbootCache().put(cache_name, key, value);
    } 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Override
    public void set(String key, String value) {
        Jboot.getCache().put(cache_name, key, value);
    }