code: def get_flat_size(self):
      return self.net.variables.get_flat_size()
  
file_path: ray/doc/source/ray-core/examples/lbfgs/driver.py
imports: import os
  import numpy
  import scipy.optimize
  import tensorflow
  from tensorflow.examples.tutorials.mnist import input_data
  import ray
  import ray.experimental.tf_utils
label_desc: Use image node_id 4 for calling the NetActor obj's underlying member method code with example usage: obj.get_flat_size() and returns: self