| callback | Callback<[ActivityResponse](#activityresponse)\> | No | Callback used to receive reported data, if the callback parameter is not passed, all callbacks subscribed to this type under this process will be removed. |
| callback | Callback<[ActivityResponse](#activityresponse)\> | No | Callback used to receive reported data. If this parameter is not passed, all callbacks associated with the specified event in the process will be unregistered. |