code: def get_locations_list(self, lower_bound=0, upper_bound=None):
          
          real_upper_bound = upper_bound
          if upper_bound is None:
              real_upper_bound = self.nbr_of_sub_locations()
  
          try:
              return self._locations_list[lower_bound:real_upper_bound]
          except:
              return list()
docs: Return the internal location list.
  
          Args:
              lower_bound:
              upper_bound:
  
          Returns: