Serialize dhtmlxGrid and include Combo cell possible values

Hello.
I am trying to use dhtmlxGrid component wherein I have a column which is displayed as dropdown list box (type=‘coro’). Below is an example of the XML for a row:

<row id="1">
	<cell>1</cell>	
	<cell>Questionnaire 1</cell>
	<cell>This is the description of Questionnaire 1</cell>
	<cell xmlcontent="true">
		<option value="1">New Business</option>
		<option value="2">Existing Business</option>
		<option value="3">Individual Business</option>
	</cell>						
</row>

During serialization, I am hoping to include the possible options for the dropdown list box and not just the selected option value. Right now, upon serialization, I am getting this format for a row, assuming that option 1 is selected from the drop down options:

<row id="1">
	<cell>1</cell>	
	<cell>Questionnaire 1</cell>
	<cell>This is the description of Questionnaire 1</cell>

1

Is there an easy way to accomplish this is DHTMLx?

Unfortunately such feature is not available. only the values of the cells can be serialized.