code: def add_external_tracker(self, bug_ids, ext_bz_bug_id, ext_type_id=None,
                               ext_type_description=None, ext_type_url=None,
                               ext_status=None, ext_description=None,
                               ext_priority=None):
          
          param_dict = {'ext_bz_bug_id': ext_bz_bug_id}
          if ext_type_id is not None:
              param_dict['ext_type_id'] = ext_type_id
          if ext_type_description is not None:
              param_dict['ext_type_description'] = ext_type_description
          if ext_type_url is not None:
              param_dict['ext_type_url'] = ext_type_url
          if ext_status is not None:
              param_dict['ext_status'] = ext_status
          if ext_description is not None:
              param_dict['ext_description'] = ext_description
          if ext_priority is not None:
              param_dict['ext_priority'] = ext_priority
          params = {
              'bug_ids': self._listify(bug_ids),
              'external_bugs': [param_dict],
          }
  
          log.debug("Calling ExternalBugs.add_external_bug(%s)", params)
          return self._proxy.ExternalBugs.add_external_bug(params)
docs: Wrapper method to allow adding of external tracking bugs using the
          ExternalBugs::WebService::add_external_bug method.
  
          This is documented at
          https://bugzilla.redhat.com/docs/en/html/api/extensions/ExternalBugs/lib/WebService.html#add_external_bug
  
          bug_ids: A single bug id or list of bug ids to have external trackers
              added.
          ext_bz_bug_id: The external bug id (ie: the bug number in the
              external tracker).
          ext_type_id: The external tracker id as used by Bugzilla.
          ext_type_description: The external tracker description as used by
              Bugzilla.
          ext_type_url: The external tracker url as used by Bugzilla.
          ext_status: The status of the external bug.
          ext_description: The description of the external bug.
          ext_priority: The priority of the external bug.