protected function define_answers_section()
 {
     $mform = $this->_form;
     // header
     parent::define_answers_section();
 }
 protected function define_answers_section()
 {
     parent::define_answers_section();
     $this->_form->addElement('html', '
     <ul id="roishape-answer-option-ctx-menu" class="dropdown-menu" role="menu" style="display:none" >
         <li class="divider"></li>
         <!--<li><a tabindex="-1" href="javascript:void(0)">Separated link</a></li>-->
         <li>
             <a id="roishape-answer-option-delete" tabindex="-1" href="javascript:void(0)">
             <i class="glyphicon glyphicon-remove-sign"></i>
             Remove</a>
         </li>
     </ul>
     ');
 }