message: Add IsGhost that returns true if all constituents are ghost particles
diff: @@ -168,6 +168,7 @@ class AliEmcalJet : public AliVParticle
  Int_t ContainsTrack(AliVParticle* track, TClonesArray* tracks) const;
  Int_t ContainsTrack(Int_t it) const;
  AliVParticle *GetLeadingTrack(TClonesArray *tracks) const;
  + Bool_t IsGhost() const { return fNn + fNch == 0; }
  // Fragmentation function
  Double_t GetZ(const Double_t trkPx, const Double_t trkPy, const Double_t trkPz) const;
  