code: def render_impl(self, template, context, **options):
          
          ropts = dict((k, v) for k, v in options.items() if k != "safe")
          tmpl = anytemplate.engines.base.fallback_render(template, {}, **ropts)
          return self.renders_impl(tmpl, context, **options)
docs: Inherited class must implement this!
  
          :param template: Template file path
          :param context: A dict or dict-like object to instantiate given
              template file
          :param options: Same options as :meth:`renders_impl`
  
              - at_paths: Template search paths (common option)
              - at_encoding: Template encoding (common option)
              - safe: Safely substitute parameters in templates, that is,
                original template content will be returned if some of template
                parameters are not found in given context
  
          :return: To be rendered string in inherited classes