code: def fix_timestamps(self, time_ref):
  		
  		
  		for k,v in self.data.items():
  			for kk, vv in v.time_stamps.items():
  				for kkk,vvv in vv.items():
  					self.data[k].time_stamps[kk][kkk] += time_ref
docs: manipulates internal time stamps such that the last run ends at time 0