{
PatchTreeRecorder<CustomPointRecord> pc = new PatchTreeRecorder<CustomPointRecord>(CustomPointRecord.class);
pc.getRecordingProxy().setCustomPoint(new TestCustom.CustomPoint(1, 2));
Assert.assertEquals(pc.generatePatchTree().getDataMap(),
diffEmpty(new CustomPointRecord().setCustomPoint(new TestCustom.CustomPoint(1, 2))));
}