def METHOD_NAME(random_xy):
    grid = RadialModelGrid(n_rings=9, nodes_in_first_ring=8, xy_of_center=random_xy)
    assert grid.xy_of_center == approx(random_xy)
    x, y = grid.x_of_node.copy(), grid.y_of_node.copy()
    grid.xy_of_center = (30.0, 45.0)
    assert grid.xy_of_center == (30.0, 45.0)
    assert grid.x_of_node - x == approx(30.0 - random_xy[0])
    assert grid.y_of_node - y == approx(45.0 - random_xy[1])