code: def post_versions_list(self, updater_name=None, updater_id=None,
                             post_id=None, start_id=None):
          
          params = {
              'search[updater_name]': updater_name,
              'search[updater_id]': updater_id,
              'search[post_id]': post_id,
              'search[start_id]': start_id
              }
          return self._get('post_versions.json', params)
docs: Get list of post versions.
  
          Parameters:
              updater_name (str):
              updater_id (int):
              post_id (int):
              start_id (int):