code: def reset(self):
  
  		
  
  		Y, D, X = self.old_data['Y'], self.old_data['D'], self.old_data['X']
  		self.raw_data = Data(Y, D, X)
  		self.summary_stats = Summary(self.raw_data)
  		self.propensity = None
  		self.cutoff = None
  		self.blocks = None
  		self.strata = None
  		self.estimates = Estimators()
docs: Reinitializes data to original inputs, and drops any estimated
  		results.