code: public void editable(String provider, String mode, String filename) throws JspException {
  
          CmsJspTagEditable.editableTagAction(getJspContext(), provider, CmsDirectEditMode.valueOf(mode), filename);
      }
docs: Includes the direct edit scriptlet, same as
  using the <code>&lt;cms:editable provider="..." mode="..." file="..." /&gt;</code>tag.<p>
  
  @param provider the direct edit provider class name
  @param mode the direct edit mode to use
  @param filename file with scriptlet code (may be <code>null</code>)
  
  @throws JspException if something goes wrong