ListGrid with canExpandRecords: how to expand only few records, not all

[J-Pro]

Hello, dear SmartGWT developers!

I'm using this code:

ListGrid listGrid = new ListGrid();  
listGrid.setWidth100();  
listGrid.setHeight("50%");  
listGrid.setShowAllRecords(true);
listGrid.setAlternateRecordStyles(true);
listGrid.setCanExpandRecords(true);  
listGrid.setExpansionMode(ExpansionMode.DETAILS);

ListGridField typeField = new ListGridField("type", "Type", 200);  
ListGridField subtypeField = new ListGridField("subtype", "Subtype", 200);  
ListGridField valueField = new ListGridField("value", "Value", 150);
ListGridField descriptionField = new ListGridField("desrc", "Description", 500);

listGrid.setFields(new ListGridField[] {typeField, subtypeField, valueField, descriptionField});        
listGrid.setCanResizeFields(true);

But having this code, I see in my rows 4 columns. And also I see the same columns in expanded details. Instead I want to see in rows only typeField and subtypeField, but in details the remaining two: valueField and descriptionField.

How can I achieve it? I was searching for something like ListGridField.setExpandable() or ListGrid.setExpandableFields(), but found nothing similar.

Thank you very much in advance!

[J-Pro]

I'm sorry for bothering, but if there is a setting please suggest me how to turn it on...

I really don't see it :(

In the showcase you initialize such a grid using datasource, but I don't have datasourse, and therefore can't see my ListGrid has expandable records :(

Thank you in advance one more time.

[J-Pro]

Sorry for posting here again, but I'm just using the moment that Isomorphic is online and can answer posts :)

Can you please help me with this issue also?

[J-Pro]

I've found the "Memo rows" example, where I can select one field to be expanded:

listGrid.setExpansionMode(ExpansionMode.DETAIL_FIELD);  
listGrid.setDetailField("background");

But how to make more than one field to be shown in ExpansionMode.DETAILS mode?
Is there such a way and you just don't want to tell for some reason, or there is no such way yet? Please answer to me to know which approach to use.

Thanks.