code: private void addListCollectorEditorButtons(Element editable) {
  
          CmsListCollectorEditor editor = new CmsListCollectorEditor(editable, m_clientId);
          add(editor, editable.getParentElement());
          if (CmsDomUtil.hasDimension(editable.getParentElement())) {
              editor.setParentHasDimensions(true);
              editor.setPosition(CmsDomUtil.getEditablePosition(editable), getElement());
          } else {
              editor.setParentHasDimensions(false);
          }
          m_editables.put(editable, editor);
      }
docs: Adds the collector edit buttons.<p>
  
  @param editable the marker element for an editable list element