+Revision 1.20 2002/04/30 11:47:30 morsch
+KeepPhysics method called by PurifyKine added (N. Carrer, A.M.)
+
+Revision 1.19 2002/03/12 11:06:03 morsch
+Add particle status code to argument list of SetTrack(..).
+
+Revision 1.18 2002/02/20 16:14:41 hristov
+fParticleBuffer points to object which doesn't belong to AliStack, do not delete it (J.Chudoba)
+
+Revision 1.17 2001/12/05 08:51:56 hristov
+The default constructor now creates no objects (thanks to r.Brun). Some corrections required by the previous changes.
+
+Revision 1.16 2001/11/20 09:27:55 hristov
+Possibility to investigate a primary of not yet loaded particle (I.Hrivnacova)
+
+Revision 1.15 2001/09/04 15:10:37 hristov
+Additional protection is included to avoid some problems using Hijing
+
+Revision 1.14 2001/08/30 09:44:06 hristov
+VertexSource_t added to avoid the warnings
+
+Revision 1.13 2001/08/29 13:31:42 morsch
+Protection against (fTreeK == 0) in destructor.
+
+Revision 1.12 2001/07/27 13:03:13 hristov
+Default Branch split level set to 99
+
+Revision 1.11 2001/07/27 12:34:20 jchudoba
+remove the dummy argument in GetEvent method
+
+Revision 1.10 2001/07/20 10:13:54 morsch
+In Particle(Int_t) use GetEntriesFast to speed up the procedure.
+