code: def _mean_zero(self, x):
      if self.mean_zero:
          return (x - 0.5) / 0.5
      else:
          return x
  
file_path: coach/rl_coach/environments/toy_problems/bit_flip.py
imports: import random
  import gym
  import numpy
  from gym import spaces
label_desc: Use image node_id 6 for calling the BitFlip obj's underlying member method code with example usage: obj._mean_zero(x) and returns: unknown, x