docs: async def _set_whitelist(self):
          """
          Whitelist domains for the messenger extensions
          """
  
          page = self.settings()
  
          if 'whitelist' in page:
              await self._send_to_messenger_profile(page, {
                  'whitelisted_domains': page['whitelist'],
              })
  
              logger.info('Whitelisted %s for page %s',
                          page['whitelist'],
                          page['page_id'])