code: def saveConfidenceIntervals(self, cost):
      cost.ci_lower, cost.ci_upper = ConfidenceInterval.calculate(
          cost.nb_examples,
          cost.test_loss,
          cost.max_loss,
          self.conf_alpha,
      )
  
file_path: vowpal_wabbit/demo/cats/utility/get_offline_results.py
imports: import sys
  import getopt
  import math
  from confidence_interval import ConfidenceInterval
label_desc: Use image node_id 6 for calling the EvaluatorOffline obj's underlying member method code with example usage: obj.saveConfidenceIntervals(cost) without return types