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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 get_map_url(self, mapsource, grid_coords):
 """ Get URL to a map region. """

        return self.get_abs_url(
                "/maps/{}/{}/{}/{}.kml".format(mapsource.id, grid_coords.zoom,
                                               grid_coords.x, grid_coords.y))