anchor.diff:                        browse_options_for_select(Collections.grouped_topics),
                         { include_blank: true },
                         { class: 'select2',
  +                        disabled: @resource.locked_for_edits?,
                           data: { placeholder: 'Choose primary topic…' } } %>
       </div>
       <div class="form-group">
  
positive.code:                       {},
                        { multiple: true,
                          class: 'select2',
                          data: { placeholder: 'Choose mainstream browse pages…' } } %>
      </div>
      <div class="form-group">
  
negative.code:                       {},
                        { multiple: true,
                          class: 'select2',
                          disabled: @resource.locked_for_edits?,
                          data: { placeholder: 'Choose additional topics…' } } %>
      </div>
    </div>
  