/**
  * Resets the {@link umontreal.iro.lecuyer.rng.RandomStream RandomStream} of the {@link
  * umontreal.iro.lecuyer.randvar.GammaGen GammaGen} and the {@link
  * umontreal.iro.lecuyer.randvar.BetaGen BetaGen} to <TT>stream</TT>.
  */
 public void setStream(RandomStream stream) {
   super.setStream(stream);
   this.Bgen.setStream(stream);
   this.stream = stream;
 }