src/org/tiefaces/components/websheet/serializable/SerialDataContext.java
private void writeObject(final java.io.ObjectOutputStream out)
			throws IOException {
		Gson objGson = new GsonBuilder().setPrettyPrinting().create();
		this.mapToJson = objGson.toJson(this.dataContext);
		out.defaultWriteObject();
	}
private void writeObject(final java.io.ObjectOutputStream out)
			throws IOException {
		Gson objGson = new GsonBuilder().setPrettyPrinting().create();
		this.mapToJson = objGson.toJson(this.dataContext);
		out.defaultWriteObject();
	}
private void writeObject ( final java . io . ObjectOutputStream out ) throws IOException { Gson objGson = new GsonBuilder ( ) . setPrettyPrinting ( ) . create ( ) ; this . mapToJson = objGson . toJson ( this . dataContext ) ; out . defaultWriteObject ( ) ; }
save the workbook before serialize.

@param out
outputstream.
@throws IOException
io exception.
save the workbook before serialize .