'Set editable = False to disable front-end rendering for this render.'

def render(self, context, width, lang=None, editable=True, use_cache=True):

    content_renderer = context.get('cms_content_renderer')
    if (not content_renderer):
        return '<!--    missing    cms_content_renderer    -->'
    width = (width or self.default_width)
    if width:
        context['width'] = width
    content = content_renderer.render_placeholder(self, context, language=lang, editable=editable, use_cache=use_cache)
    return content
