code: def get_trainable_variables(self):
      return tf.get_collection(
          tf.GraphKeys.TRAINABLE_VARIABLES, self.scope
      )
  
file_path: baselines/baselines/ppo1/cnn_policy.py
imports: import baselines.common.tf_util
  import tensorflow
  import gym
  from baselines.common.distributions import make_pdtype
label_desc: Use image node_id 5 for calling the CnnPolicy obj's underlying member method code with example usage: obj.get_trainable_variables() and returns: tf