fvtt-hero-system-6/templates/partials/partial-item-hasroll.hbs

        <li class="flexrow"><label class="item-field-label-long">Has Roll ?</label>
          <label class="item-field-label-medium"><input type="checkbox" name="system.hasroll" {{checked system.hasroll}}/></label>
        </li>

        {{#if system.hasroll}}
        <li class="flexrow"><label class="item-field-label-long">Roll</label>
          <input type="text" class="item-field-label-medium" name="system.roll" value="{{system.roll}}" data-dtype="Number"/>
        </li>

        <li class="flexrow"><label class="item-field-label-long">Computes BODY ?</label>
          <label class="item-field-label-medium"><input type="checkbox" name="system.computebody" {{checked system.computebody}}/></label>
        </li>
        {{/if}}