docs: def repo_groups(self, project_key, repo_key, limit=99999, filter_str=None):
          """
          Get repository Groups
          :param project_key:
          :param repo_key:
          :param limit: OPTIONAL: The limit of the number of groups to return, this may be restricted by
                              fixed system limits. Default by built-in method: 99999
          :param filter_str: OPTIONAL: group filter string
          :return:
          """
          url = 'rest/api/1.0/projects/{project_key}/repos/{repo_key}/permissions/groups'.format(
              project_key=project_key,
              repo_key=repo_key)
          params = {}
          if limit:
              params['limit'] = limit
          if filter_str:
              params['filter'] = filter_str
          return (self.get(url, params=params) or {}).get('values')