class AliLego: public TNamed

  Utility class to evaluate the material budget from
  a given radius to the surface of an arbitrary cylinder
  along radial directions from the centre:

   - radiation length
   - Interaction length
   - g/cm2

  Geantinos are shot in the bins in the fNtheta bins in theta
  and fNphi bins in phi with specified rectangular limits.
  The statistics are accumulated per
    fRadMin < r < fRadMax    and  <0 < z < fZMax

  To activate this option, you can do:
      Root > gAlice.RunLego();
  or  Root > .x menu.C  then select menu item "RunLego"
  Note that when calling gAlice->RunLego, an optional list
  of arguments may be specified.