code: def load_default_healthchecks(self):
          
          default_healthchecks = getattr(settings, 'HEALTHCHECKS', DEFAULT_HEALTHCHECKS)
          for healthcheck in default_healthchecks:
              healthcheck = import_string(healthcheck)
              self.register_healthcheck(healthcheck)
docs: Loads healthchecks specified in settings.HEALTHCHECKS as dotted import
          paths to the classes. Defaults are listed in `DEFAULT_HEALTHCHECKS`.