Stamps a chart's per-datum marks and returns the ways they can be addressed.
The marks of every series are found together, because they are painted the
same way and only their order tells them apart -- so the total is checked
once, against what every series says it drew, and a mismatch drops the
highlighting for the whole chart.
Stamps a chart's per-datum marks and returns the ways they can be addressed.
The marks of every series are found together, because they are painted the same way and only their order tells them apart -- so the total is checked once, against what every series says it drew, and a mismatch drops the highlighting for the whole chart.