StreamerInfo cntd.

The StreamerInfo is saved into a StreamerInfoList object that includes the StreamerInfos for all classes in a Root Tree or Root file in general.
In case of a TTree, the StreamerInfoList is a new member of the class and saved with theTree header.
In case of a file, the same list is a member of the TDirectory class and saved when the file is closed.
The StreamerInfo can be used to read objects or Trees when the original user classes are not available.

The StreamerInfo is saved into a StreamerInfoList object that includes the StreamerInfos for all classes in a Root Tree or Root file in general.