Grid sum and average is summary (2 rows)

[Misiu]

We can add summary to grid using:

features: [{
            ftype: 'summary''
        }],' 

This gives us row at bottom.
But can we add 2 summary rows? One showing sum and second average?

[Gary Schlosberg]

Here's one solution:
http://www.sencha.com/forum/showthread.php?105070

[Misiu]

Thanks Gary, I found that solution earlier, it's an option, but I would like both summaries to be in separate rows.
For now I'll probably stay with this solution, but I hope that this will be added to ExtJS in some time (maybe ExtJS5) I think not only I need multi line summaries.