code: def show_diff_between_two_observations(observation1, observation2):
      plt.imshow(observation1 - observation2, cmap="gray")
      plt.show()
  
file_path: coach/rl_coach/debug_utils.py
imports: import math
  import matplotlib.pyplot
  import numpy
  from rl_coach.filters.observation.observation_stacking_filter import LazyStack
label_desc: Use image node_id 2 for calling a global function with example usage: show_diff_between_two_observations(observation1, observation2) without return types