Suppress an Info message
see : http://root.cern.ch/phpBB3/posting.php?mode=reply&f=15&t=16136


git-svn-id: https://root.cern.ch/svn/root/trunk@48810 27541ba8-7e3a-0410-8455-c3a389f83636
Add documentation and silence doxygen warning.


git-svn-id: https://root.cern.ch/svn/root/trunk@48812 27541ba8-7e3a-0410-8455-c3a389f83636