e flag, if applicable


    <h3>Parameters:</h3>
    <ul>
        <li><span class="parameter">source</span>
         Entity. The cause of the freezing
        </li>
    </ul>





</dd>
    <dt>
    <a name = "feature:apply_heat"></a>
    <strong>feature:apply_heat (source)</strong>
    </dt>
    <dd>
    Checks a feature's apply_heat() callback, if applicable, or its heat_feature flag, if applicable


    <h3>Parameters:</h3>
    <ul>
        <li><span class="parameter">source</span>
         Entity. The c