code: def get_attachment(self, scope_identifier, hub_name, plan_id, timeline_id, record_id, type, name):
          
          route_values = {}
          if scope_identifier is not None:
              route_values['scopeIdentifier'] = self._serialize.url('scope_identifier', scope_identifier, 'str')
          if hub_name is not None:
              route_values['hubName'] = self._serialize.url('hub_name', hub_name, 'str')
          if plan_id is not None:
              route_values['planId'] = self._serialize.url('plan_id', plan_id, 'str')
          if timeline_id is not None:
              route_values['timelineId'] = self._serialize.url('timeline_id', timeline_id, 'str')
          if record_id is not None:
              route_values['recordId'] = self._serialize.url('record_id', record_id, 'str')
          if type is not None:
              route_values['type'] = self._serialize.url('type', type, 'str')
          if name is not None:
              route_values['name'] = self._serialize.url('name', name, 'str')
          response = self._send(http_method='GET',
                                location_id='7898f959-9cdf-4096-b29e-7f293031629e',
                                version='5.0-preview.1',
                                route_values=route_values)
          return self._deserialize('TaskAttachment', response)
docs: GetAttachment.
          [Preview API]
          :param str scope_identifier: The project GUID to scope the request
          :param str hub_name: The name of the server hub: "build" for the Build server or "rm" for the Release Management server
          :param str plan_id:
          :param str timeline_id:
          :param str record_id:
          :param str type:
          :param str name:
          :rtype: :class:`<TaskAttachment> <azure.devops.v5_0.task.models.TaskAttachment>`