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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def __reverse(self, **kwargs):
 """ If we hit the bathymetry, set the location to where we came from. """

        start_point = kwargs.pop('start_point')
        return Location4D(latitude=start_point.latitude, longitude=start_point.longitude, depth=start_point.depth)