Is there a parser for RooCmdArg?

Roofit and RooStats
1

Hi experts,
Is there a parser for RooCmdArg?
Take one function for example:
RooCmdArg RenameAllNodes(const char* suffix) { return RooCmdArg(“RenameAllNodes”,0,0,0,0,suffix,0,0,0) ; }

How can I know what each argument stands for?
Thank you in advance.