code: def check_estimates_exist(self):
      assert self.direct_method is not None
      assert self.inverse_propensity is not None
      assert self.doubly_robust is not None
      assert self.sequential_doubly_robust is not None
      assert self.weighted_doubly_robust is not None
      assert self.magic is not None
  
file_path: ReAgent/reagent/evaluation/cpe.py
imports: import logging
  import math
  from typing import Dict, NamedTuple, Optional
  import numpy
  import torch
  from reagent.core.tensorboardX import SummaryWriterContext
label_desc: Use image node_id 1 for calling the CpeEstimateSet obj's underlying member method code with example usage: obj.check_estimates_exist() without return types