Deprecated. Please use AddFrequencyObject instead.

def AddHeadwayPeriodObject(self, headway_period, problem_reporter):
    """Deprecated. Please use AddFrequencyObject instead."""
    warnings.warn("No longer supported. The HeadwayPeriod class was renamed to "
                  "Frequency, and all related functions were renamed "
                  "accordingly.", DeprecationWarning)
    self.AddFrequencyObject(frequency, problem_reporter)