code: protected void openEditDialog(boolean isNew, String mode, CmsEditHandlerData handlerDataForNew) {
  
          CmsContainerpageController.get().getContentEditorHandler().openDialog(
              m_editableData,
              isNew,
              m_parentResourceId,
              mode,
              handlerDataForNew);
      }
docs: Opens the content editor.<p>
  
  @param isNew <code>true</code> to create and edit a new resource
  @param mode the content creation mode
  @param handlerDataForNew the data for the edit handler if it is used for the 'new' function