The set name is only stored, as the SetMap is used for dereferencing.
|  NodeSet (const char* c_str, unsigned line)
 | NodeSet | 
Parameters:
| c_str | the name of the set. | 
| line | line of configuration where node was created. | 
|  DEFINE_VISITABLE ()
 | DEFINE_VISITABLE | 
| const string&  setid ()
 | setid | 
[const]
Returns: the name of the set.