code: def get_time_rate(self):
          '''
          getter
          Time rate.
          '''
          if isinstance(self.__time_rate, float) is False:
              raise TypeError("The type of __time_rate must be float.")
  
          if self.__time_rate <= 0.0:
              raise ValueError("The value of __time_rate must be greater than 0.0")
  
          return self.__time_ratf get_time_rate(self):
          '''
          getter
          Time rate.
          '''
          if isinstance(self.__time_rate, float) is False:
              raise TypeError("The type of __time_rate must be float.")
  
          if self.__time_rate <= 0.0:
              raise ValueError("The value of __time_rate must be greater than 0.0")
  
          return self.__time_rate
docs: getter
          Time rate.