Spectrum Spatial (SSA/LIM)

I am developing an extension for SSA and am wondering is there a way to have a vector layer legend collapsed by default?

Here is some sample code:

// Create payload for the vector layer on map with legend

            const vectorLayerData = {

                friendlyName: 'Custom Query',

                source: vectorSource,

                doNotCreateLegend: false,

                style: {

                    fillColor: "#939BFF",

                    fillPattern: 16,

                    lineStrokeColor: "#939BFF",

                    lineStrokePattern: 1,

                    lineStrokeWidth: 2,

                    pointIcon: 1,

                    polyFillColor: "#939BFF",

                    polyStrokeColor: "#939BFF",

                    polyStrokePattern: 3,

                    polyStrokeWidth: 2

                }

            };

            // Dispatch the action to create vector layer

            this.store.dispatch(new AddVectorLayerAction(vectorLayerData));


Cheers,
Ben