fine class A</span></span></span>
<span class="r-in"><span><span class="va">A</span> <span class="op">&lt;-</span> <span class="fu"><a href="new_class.html">new_class</a></span><span class="op">(</span><span class="va">B</span>, <span class="va">C</span>, class_name <span class="op">=</span> <span class="st">"A"</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="register_method.html">register_method</a></span><span class="op">(</span><span class="va">A</span>, f