code: def separation_in_list(separation_indices, separation_indices_list):
      
      sorted_separation = sort_separation(separation_indices)
      for sep in separation_indices_list:
          if len(sep[1]) == len(sorted_separation[1]) and np.allclose(sorted_separation[1], sep[1]):
              return True
      return False
docs: Checks if the separation indices of a plane are already in the list
      :param separation_indices: list of separation indices (three arrays of integers)
      :param separation_indices_list: list of the list of separation indices to be compared to
      :return: True if the separation indices are already in the list, False otherwise