How to use the gpxpy.gpx.GPXBounds function in gpxpy

max_lat = None
        min_lon = None
        max_lon = None
        for track in self.tracks:
            bounds = track.get_bounds()

            if not mod_utils.is_numeric(min_lat) or bounds.min_latitude < min_lat:
                min_lat = bounds.min_latitude
            if not mod_utils.is_numeric(max_lat) or bounds.max_latitude > max_lat:
                max_lat = bounds.max_latitude
            if not mod_utils.is_numeric(min_lon) or bounds.min_longitude < min_lon:
                min_lon = bounds.min_longitude
            if not mod_utils.is_numeric(max_lon) or bounds.max_longitude > max_lon:
                max_lon = bounds.max_longitude

        return GPXBounds(min_lat, max_lat, min_lon, max_lon)

min_lat = None
        max_lat = None
        min_lon = None
        max_lon = None

        for point in self.points:
            if min_lat is None or point.latitude < min_lat:
                min_lat = point.latitude
            if max_lat is None or point.latitude > max_lat:
                max_lat = point.latitude
            if min_lon is None or point.longitude < min_lon:
                min_lon = point.longitude
            if max_lon is None or point.longitude > max_lon:
                max_lon = point.longitude

        return GPXBounds(min_lat, max_lat, min_lon, max_lon)

def get_bounds(self):
        """
        Get the bounds of the DFTrack

        Returns
        -------
        bounds: gpxpy.GPXBounds
        """
        min_lat = self.df['Latitude'].min()
        max_lat = self.df['Latitude'].max()
        min_lng = self.df['Longitude'].min()
        max_lng = self.df['Longitude'].max()

        return GPXBounds(min_lat, max_lat, min_lng, max_lng)

max_lat = None
        min_lon = None
        max_lon = None
        for track_segment in self.segments:
            bounds = track_segment.get_bounds()

            if not mod_utils.is_numeric(min_lat) or (bounds.min_latitude and bounds.min_latitude < min_lat):
                min_lat = bounds.min_latitude
            if not mod_utils.is_numeric(max_lat) or (bounds.max_latitude and bounds.max_latitude > max_lat):
                max_lat = bounds.max_latitude
            if not mod_utils.is_numeric(min_lon) or (bounds.min_longitude and bounds.min_longitude < min_lon):
                min_lon = bounds.min_longitude
            if not mod_utils.is_numeric(max_lon) or (bounds.max_longitude and bounds.max_longitude > max_lon):
                max_lon = bounds.max_longitude

        return GPXBounds(min_lat, max_lat, min_lon, max_lon)