BodyLayerStack bs = (BodyLayerStack) cell.getLayer().getUnderlyingLayerByPosition(cell.getColumnIndex(), cell.getRowIndex());
List<Object> rowSpan = ArrayUtil.asList(bs.getSelectionLayer().getSelectedRowPositions().toArray());
List<Integer> columnSpan = ArrayUtil.asIntegerList(bs.getSelectionLayer().getSelectedColumnPositions());
List<Integer> rowSpanRange = ArrayUtil.asList(((Range) rowSpan.get(0)).getMembers().toArray(new Integer[0]));
List<ILayerCell> mergedCells = new ArrayList<ILayerCell>();
	for (Integer indexY : rowSpanRange) {
		for (Integer indexX : columnSpan) {
			mergedCells.add(bs.getCellByPosition(indexX, indexY)); // yielding a list of cells with mostly null values
		}
	}

((NatTable) parent).getLayer().getCellByPosition(2, 2); // yielding cells but with mostly null values
((NatTable) parent).getLayer().getDataValueByPosition(2, 2); // yielding the correct value
((NatTable) parent).getLayer().getConfigLabelsByPosition(2, 2); // yielding the correct value