Function brushed

src/component/brush/visualEncoding.ts:140–142

(rangeInfoList: BrushSelectableArea[])

        // If no supported brush or no brush on the series,
        // all visuals should be in original state.
        function brushed(rangeInfoList: BrushSelectableArea[]): boolean {
            return !!rangeInfoList.length;
        }

        /**
         * Logic for each series: (If the logic has to be modified one day, do it carefully!)