TIWCGJQTreeViewCore.InitiallyOpen Property
When set to true forces loading of nodes marked as open, which do not have children. Otherwise nodes are only visualized as open without any children and opening/closing such a node won't cause it to load (make a server call).
published property InitiallyOpen: TIWCGJSonSimpleArray index 02 read GetSimpleArrayValue write SetSimpleArrayValue stored IsObjStored;