ecision-analytic model function is of the appropriate form.  Detect if it returns net benefit or CEA format
note check_outputs adds a class</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">check_model_fn</span><span class="op">(</span></span>
<span>  <span class="va">model_fn</span>,</span>
<span>  <span class="va">par_fn</span>,</sp