print "aGroupOnShell type =", aGroupOnShell.GetType()
print "aGroupOnShell size =", aGroupOnShell.Size()
print "aGroupOnShell ids :", aGroupOnShell.GetListOfID()
print "aGroupOnShell type =", aGroupOnShell.GetType()
print "aGroupOnShell size =", aGroupOnShell.Size()
print "aGroupOnShell ids :", aGroupOnShell.GetListOfID()