How do I normalize Bubble Sizes for BubbleChartView across DataSets?

I have a BubbleChartView with multiple data sets, with size normalizing enabled. I'd like for the chart to set the maxSize to the max of each DataSet's maxSizes, but this doesn't currently seem doable, unless I'm missing something?

Start at BubbleChartView and trace the normalization path for multiple DataSets, focusing on maxSize and each DataSet's maxSizes. Done means the chart can derive maxSize from the DataSets' maxima when normalization is enabled, with the behavior verified by relevant tests.

Written by the indexing model from the issue text.