hat parent method can be called more handily,
awareness needs to be raised when saving and loading these classes/instances.
It is very likely the same class stored in different objects becomes different
environments.</p>
    </div>

    <div class="section level2">
    <h2 id="ref-usage">Usage<a class="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">base_</span><span class="op">(</span><span class="va">...</span>, env