code: def render(self, context):
          
  
          content = mark_safe(self.get_content_from_context(context))
          if not content:
              return ''
          if self.parsed:
              try:
                  t = template.Template(content, name=self.name)
                  content = mark_safe(t.render(context))
              except TemplateSyntaxError as error:
                  if global_settings.DEBUG:
                      content = PLACEHOLDER_ERROR % {
                          'name': self.name,
                          'error': error,
                      }
                  else:
                      content = ''
          if self.as_varname is None:
              return content
          context[self.as_varname] = content
          return ''
docs: Output the content of the `PlaceholdeNode` in the template.