I removed brushing while comparing rollout sets in f67f207. Some use cases may want this functionality, but since the use case is less common I am only going to reimplement this if people comment here. It adds a lot of complexity for something I have yet to find useful. If I do reimplement this in the future, I should probably do it as a new chart type (or at least toggle a different set of functions depending on whether the chart is showing two rollout sets) because the case analysis involved in a single chart object is not worth the complexity.
I removed brushing while comparing rollout sets in f67f207. Some use cases may want this functionality, but since the use case is less common I am only going to reimplement this if people comment here. It adds a lot of complexity for something I have yet to find useful. If I do reimplement this in the future, I should probably do it as a new chart type (or at least toggle a different set of functions depending on whether the chart is showing two rollout sets) because the case analysis involved in a single chart object is not worth the complexity.