public static ValueLabel formatBytes(long bytes) {
        return new ValueLabel(bytes, BYTES_UNIT);
    }
@Test
    public void formatKiloBytes() {
        vl = TopoUtils.formatBytes(2_000L);
        assertEquals(AM_WM, TopoUtils.Magnitude.KILO, vl.magnitude());
        assertEquals(AM_WL, "1.95 KB", vl.toString());
    }