TIWCGJQTreeViewJSONPlugin.ProgressiveUnload Property
If this option is set to true when a node is closed its children are removed from the DOM and saved as metadata on the node itself, on reopen that metadata is used (much like progressive_render).
published property ProgressiveUnload: boolean index 04 read GetBooleanValue write SetBooleanValue stored IsBooleanStored;
Property Value
Type: boolean