code: def large_image_url(self):
          
          if self.application_id is None:
              return None
  
          try:
              large_image = self.assets['large_image']
          except KeyError:
              return None
          else:
              return 'https://cdn.discordapp.com/app-assets/{0}/{1}.png'.format(self.application_id, large_image)
docs: Optional[:class:`str`]: Returns a URL pointing to the large image asset of this activity if applicable.