message: Option to enable/disable PMT Shield and OldAD
  option to enable/disable PMT shields and OldAD (Beam monitor between V0A and compensator magnet).
  Both structures are enabled by default. To disable any of them do:
  EnablePmtShieldingADA(false);
  EnableOldADA(false);
diff: @@ -58,7 +58,14 @@ public:
  virtual void DisableStructuresSideC() { fADCstruct = kFALSE; }
  virtual void DisableStructuresSideA() { fADAstruct = kFALSE; }
  virtual void KeepHistory() { fKeepHistory = kTRUE; }
  -
  + // Added option to enable/disable PMT Shield and OldAD
  +private:
  + Bool_t fEnabledPmtShldADA; //!
  + Bool_t fEnabledOldADA ; //!
  +public :
  + virtual void EnablePmtShieldingADA(const Bool_t flag) { fEnabledPmtShldADA = flag; }
  + virtual void EnableOldADA (const Bool_t flag) { fEnabledOldADA = flag; }
  + //
  enum ADCPosition_t { kADCInTunnel, kADCInCavern, kADCInBoth};
  protected:
  