TreeGrid changing setLoadDataOnDemand()

[pH4Lk0n]

Hi,

I've got a TreeGrid with DataSource loading data from server and
setLoadDataOnDemand(true).
It's working fine but in some cases users want automatic expand all feature. Thing is when setLoadDataOnDemand(true) expanding all rows throws a fetch for every tree folder. I've done like this:

Tree tree = treeGrid.getTree();
tree.openAll();

When I initially set setLoadDataOnDemand(false) it fetches all rows much faster with only few requests and automatically expands all folders.

The question is can I change this property after component was created.
I've tried after this set to fetchData() or invalidateCache() but with no success.

Thanks for any help.
Best regards