code: def log_vars(prefix, variables):
      """logging TF varables metadata"""
      logging.info(f"{prefix}:")
      for var in variables:
          logging.info(
              f"\tname = {var.name}, shape = {var.shape}, device = {var.device}"
          )
  
imports: import os
  from absl import logging
  import numpy
  import delta.compat
  from tensorflow.python.client import device_lib
  from tensorflow.python.estimator.canned import metric_keys
  from tensorflow.python.util import nest
  from delta.utils.register import registers
label_desc: Use image node_id 4 for calling a global function with example usage: log_vars(prefix, variables) without return types