ure, these designs with shared mutability likely aren&#39;t threadsafe and the solution probably means adding a Mutex or similar. Though this runs into the Mutex/RefCell not being considered for this article</div><div class="created-date">Dec 20, 2021, 10:20 PM</div></div></div><div id="AAAATTv0iUA" class="reply-box"><div class="author-picture"><img src="https://lh3.googleusercontent.com/a-/AOh14GjoOXwuji1Q0p6FX0IRu-PBtgN-CxWdF8wvbNemn1A=s50-c-k-no" width="24" height="24" alt="Author profile image"></div><d