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