code: def concat_obs_and_action(obs, action):
      """Concat observation and action to feed the critic."""
      return F.concat((obs, action), axis=-1)
  
file_path: chainerrl/examples/atlas/train_soft_actor_critic_atlas.py
imports: import argparse
  import functools
  import logging
  import os
  import sys
  import chainer
  from chainer import functions
  from chainer import links
  from chainer import optimizers
  import gym
  import gym.wrappers
  import numpy
  import chainerrl
  from chainerrl import experiments
  from chainerrl import misc
  from chainerrl import replay_buffer
label_desc: Use image node_id 1 for calling a global function with example usage: concat_obs_and_action(obs, action) and returns: F