9 #ifndef DERIVATIONFRAMEWORK_SKIMMINGTOOLEXAMPLE_H 
   10 #define DERIVATIONFRAMEWORK_SKIMMINGTOOLEXAMPLE_H 1 
   34     using base_class::base_class;
 
   44       {
this, 
"MuonContainerKey", 
"Muons", 
"Key for muon container"};
 
   47       {
this, 
"NumberOfMuons", 2, 
"Minimum number of muons"};
 
   50       {
this, 
"MuonPtCut", 10000.0, 
"p_T cut on muon in MeV"};
 
   52     mutable std::atomic<unsigned int> 
m_ntot{0};
 
   53     mutable std::atomic<unsigned int> 
m_npass{0};