code: def plot_list_of_observation_stacks(observation_stacks):
      for idx, stack in enumerate(observation_stacks):
          show_observation_stack(
              stack["observation"],
              True,
              False,
              force_num_rows=len(observation_stacks),
              row_to_update=idx,
          )
      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 5 for calling a global function with example usage: plot_list_of_observation_stacks(observation_stacks) without return types