def METHOD_NAME():
    s1 = Sphere(ntheta=4, nphi=4, axial_symmetry=False, clip_free_surface=True)
    s2 = Sphere(ntheta=8, nphi=4, axial_symmetry=False, clip_free_surface=False).keep_immersed_part()
    assert s1.mesh.nb_faces == s2.mesh.nb_faces
    assert s1.mesh.nb_vertices == s2.mesh.nb_vertices
    # TODO: test that the faces are actually the same.