#include "PhysicsTools/RecoUtils/interface/CandKinematicVertexFitter.h"
#include "RecoVertex/KinematicFit/interface/KinematicParticleFitter.h"
#include "RecoVertex/KinematicFit/interface/MassKinematicConstraint.h"
#include "DataFormats/GsfTrackReco/interface/GsfTrack.h"
#include "DataFormats/Candidate/interface/VertexCompositeCandidate.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "SimGeneral/HepPDTRecord/interface/ParticleDataTable.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include <sstream>
#include <iostream>