text: #ifndef EventVariablePairMass_h
  #define EventVariablePairMass_h
  
  #include <vector>
  #include "RutgersIAF/EventAnalyzer/interface/EventVariable.h"
  
  class EventVariablePairMass : public EventVariable{
   public:
    EventVariablePairMass(TString name, TString productname, TString prefix="", double peak = 0, double width = 10) : EventVariable(name),m_prefix(prefix),m_peak(peak),m_width(width) {m_productnames.push_back(productname);}
  
    void addProduct(TString);
  
    bool calculate(BaseHandler*);
  
    ClassDef(EventVariablePairMass,1);
  
   private:
    TString m_prefix;
    double m_peak;
    double m_width;
    std::vector<TString> m_productnames;
  
  
  };
  
  #endif
  