def METHOD_NAME(self):
    p1 = (0, -1, 0)
    p2 = (1, 1, 0)
    p3 = (2, -1, 0)
    p4 = (3, 1, 0)
    plane = linear_approximation([p1, p2, p3, p4]).most_similar_plane()
    self.assert_sverchok_data_equal(tuple(plane.normal.normalized()), (0, 0, 1), precision=5)