code: def get_batch_size(self):
      return self.batch_size
  
file_path: nni/nni/compression/quantization_speedup/calibrator.py
imports: import os
  import logging
  import tensorrt
  import pycuda.driver
label_desc: Use image node_id 3 for calling the Calibrator obj's underlying member method code with example usage: obj.get_batch_size() and returns: self