040000 tree 673f2cbbf53c7d40cccac68e0702f01e40dd7fb7	device
040000 tree b2237275dcd028147d0aa80a5940e530641632b8	host
040000 tree 7ddd8ea899eb95147e4eac9ae97f8f61e2d87f4e	link
040000 tree 7d55199f69f9e6b16753e4e0ffb2ca513967e7d3	topology