<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def end_frequency(self, index):
 """ Return the end frequency of the waveform at the given index value """

        from pycbc.waveform.waveform import props

        return pycbc.waveform.get_waveform_end_frequency(
                                self.table[index],
                                approximant=self.approximant(index),
                                **self.extra_args)