docs: def get_as_string(self, request, *args, **kwargs):
          """
          Should only be used when inheriting from cms View.
  
          Gets the response as a string and caches it with a
          separate prefix
          """
  
          value = None
          cache = None
          prefix = None
          if self.should_cache():
              prefix = "%s:%s:string" % (self.get_cache_version(),
                                  self.get_cache_prefix())
              cache = router.router.get_cache(prefix)
              value = cache.get(prefix)
  
          if not value:
              value = super(CacheView, self).get_as_string(request, *args,
                                                           **kwargs)
              if self.should_cache() and value and \
                      getattr(self.request, '_cache_update_cache', False):
                  cache.set(prefix, value, self.cache_time)
  
          return value