def METHOD_NAME(self):
    """
    Reverse some faces and make sure fix_face_winding flips
    them back.
    """
    meshes = [g.get_mesh(i) for i in
              ['unit_cube.STL',
               'machinist.XAML',
               'round.stl',
               'quadknot.obj',
               'soup.stl']]
    for i, mesh in enumerate(meshes):
        # turn scenes into multibody meshes
        if g.trimesh.util.is_instance_named(mesh, 'Scene'):
            meta = mesh.metadata
            meshes[i] = mesh.dump().sum()
            meshes[i].metadata = meta
    timing = {}
    for mesh in meshes:
        # save the initial state
        is_volume = mesh.is_volume
        winding = mesh.is_winding_consistent
        tic = g.time.time()
        # flip faces to break winding
        mesh.faces[:4] = g.np.fliplr(mesh.faces[:4])
        # run the operation
        mesh.fix_normals()
        # make sure mesh is repaired to former glory
        assert mesh.is_volume == is_volume
        assert mesh.is_winding_consistent == winding
        # save timings
        timing[mesh.metadata['file_name']] = g.time.time() - tic
    # print timings as a warning
    g.log.warning(g.json.dumps(timing, indent=4))