class PolygonGroup:
    def __init__(self, polygons=None):
        self.polygons = []
        if polygons is not None:
            self.polygons.extend(polygons)

    def apply_transformation(self, transformation):
        list(map(lambda x: x.apply_transformation(transformation), self.polygons))

    def draw_to_svg(self, svg):
        list(map(lambda x: x.draw_to_svg(svg), self.polygons))