You can't do that with an Accordian, because you can only select 1 chlid at a time.
If you might have to try to create a set of panels and resize them on click so that they are all "open".
Thanks for your suggession , I will try this..
Is Tree can have customized Item renderer as per my requiremnet.
Thanks and Regards
You can have multiple nodes open on a tree, so I guess you could open them all up on a button click.
Another option that might be possible is to use individual Accordians for each section and then use the click function to close the others.