src/org/tiefaces/components/websheet/serializable/SerialCellMap.java
private void writeObject(final java.io.ObjectOutputStream out)
			throws IOException {
		saveList = new ArrayList<>();
		for (Map.Entry<Cell, String> entry : this.getMap().entrySet()) {
			saveList.add(
					new SerialKey(new SerialCellAddress(entry.getKey()),
							entry.getValue()));
		}
		out.defaultWriteObject();
	}
private void writeObject(final java.io.ObjectOutputStream out)
			throws IOException {
		saveList = new ArrayList<>();
		for (Map.Entry<Cell, String> entry : this.getMap().entrySet()) {
			saveList.add(
					new SerialKey(new SerialCellAddress(entry.getKey()),
							entry.getValue()));
		}
		out.defaultWriteObject();
	}
save the cell before serialize.

@param out
outputstream.
@throws IOException
io exception.