class THtml::TModuleDefinition: public THtml::THelperBase

 Set out_modulename to cl's module name; return true if it's valid.
 If applicable, the module contains super modules separated by "/".

 ROOT takes the directory part of cl's implementation file name
 (or declaration file name, if the implementation file name is empty),
 removes the last subdirectory if it is "src/" or "inc/", and interprets
 the remaining path as the module hierarchy, converting it to upper case.
 hist/histpainter/src/THistPainter.cxx thus becomes the module
 HIST/HISTPAINTER. (Node: some ROOT packages get special treatment.)
 If the file cannot be mapped into this scheme, the class's library
 name (without directories, leading "lib" prefix or file extensions)
 ius taken as the module name. If the module cannot be determined it is
 set to "USER" and false is returned.

 If your software cannot be mapped into this scheme then derive your
 own class from TModuleDefinition and pass it to THtml::SetModuleDefinition().

 The fse parameter is used to determine the relevant part of the path, i.e.
 to not include parent directories of a TFileSysRoot.