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