nx">value</span><span class="p">);</span>
        <span class="p">}</span>
      <span class="p">}</span>

      <span class="k">return</span> <span class="k">this</span><span class="p">;</span>
    <span class="p">}</span>

    <span class="nx">options</span> <span class="o">||</span> <span class="p">(</span><span class="nx">options</span> <span class="o">=</span> <span class="p">{});</span>
    <span class="nx">klass</span><span class="p">.</span><span class="nx">properties</span><span class="p">[</span><