I'd like to apply grouping within Web AppBuilder's layer list. Because the map layers are coming from data hosted in ArcGIS Online (not published from ArcGIS Server), this is normally not available and so it looks like I'll need to customise the layer list widget. Does anyone have any experience in this? I'd like to get some idea of the best approach and what would be involved.
Some questions I'm considering: Would this work best if the layers were organised into several web maps, one group per web map? What changes do I need to make to the LayerList widget? What other widgets would I need to change and how?
Any insights or sample code would be most welcome. Thanks.
