text: /* \class MassKinFitterCandProducer
   *
   * \author Luca Lista, INFN
   *
   */
  #include "FWCore/ParameterSet/interface/ParameterSet.h"
  #include "PhysicsTools/RecoAlgos/interface/MassKinFitterCandProducer.h"
  
  class CustomKinFitter : public CandMassKinFitter {
  public:
    CustomKinFitter(double mass) : CandMassKinFitter(mass) { }
    virtual ~CustomKinFitter() = default;
  private:
    virtual double errEt(double et, double eta) const { return 0.2; }
    virtual double errEta(double et, double eta) const { return 0.2; }
    virtual double errPhi(double et, double eta) const { return 0.2; }
  };
  
  class MassKinFitterCandCustomProducer : public MassKinFitterCandProducer {
  public:
    explicit MassKinFitterCandCustomProducer(const edm::ParameterSet& cfg) :
      MassKinFitterCandProducer(cfg, new CustomKinFitter(cfg.getParameter<double>("mass"))) { }
  };
  
  #include "FWCore/Framework/interface/MakerMacros.h"
  
  DEFINE_FWK_MODULE( MassKinFitterCandCustomProducer );
  
  