code: def _get(cls, resource_id, parent_id, grandparent_id):
          Retrieves the required resource."""
          client = cls._get_client()
          endpoint = cls._endpoint.format(resource_id=resource_id or "",
                                          parent_id=parent_id or "",
                                          grandparent_id=grandparent_id or "")
          raw_data = client.get_resource(endpoint)
          raw_data["parentResourceID"] = parent_id
          raw_data["grandParentResourceID"] = grandparent_id
          return cls.from_raw_data(raw_data)
docs: Retrieves the required resource.