code: def write_area_data(self, file):
          
          file.write("%% area data" + "\n")
          file.write("%\tno.\tprice_ref_bus" + "\n")
          file.write("areas = [" + "\n")
          # TODO: Implement areas
          file.write("\t1\t1;" + "\n")
  
          file.write("];" + "\n")
docs: Writes area data to file.