return new ServerSideDocDiff(patches);
	}
	

	// XXX Unnecessary copy-pasting
	private static SetDiff<MarkerAnnotation, TransportMarkerAnnotation> diffMA(
			Set<MarkerAnnotation> anns1,
			Set<MarkerAnnotation> anns2) {
		if (anns2 == null && anns1 != null) {
			return null;
		}
		if (anns1==null) {
			anns1 = Collections.emptySet();
		}
		if (anns2==null) {
			anns2 = Collections.emptySet();
		}
		return new SetDiff.Differ<MarkerAnnotation,TransportMarkerAnnotation>().diff(anns1, anns2);
	}

	// XXX Unnecessary copy-pasting
	private static SetDiff<RowAnnotation, TransportRowAnnotation> diffRA(
			Set<RowAnnotation> anns1,
			Set<RowAnnotation> anns2) {
		if (anns2 == null && anns1 != null) {
			return null;
		}
		if (anns1==null) {
			anns1 = Collections.emptySet();
		}
		if (anns2==null) {
			anns2 = Collections.emptySet();
		}
		return new SetDiff.Differ<RowAnnotation,TransportRowAnnotation>().diff(anns1, anns2);
	}