public String getBluetoothAddress() { return mBluetoothAddress; }
@Test
    public void testCanSerializeWithMac() throws Exception {
        org.robolectric.shadows.ShadowLog.stream = System.err;
        Region region = new Region("myRegion", "1B:2a:03:4C:6E:9F");
        byte[] serializedRegion = convertToBytes(region);
        Region region2 = (Region) convertFromBytes(serializedRegion);
        assertEquals("Right number of identifiers after deserialization", 0, region2.mIdentifiers.size());
        assertEquals("ac is same after deserialization", region.getBluetoothAddress(), region2.getBluetoothAddress());
    }