SeriesStack

Configures the Stacked series.

Name	Type	Default	Description
group?	string		The optional stack group name. The group option is supported for the Bar and Column series.
type?	"normal" | "100%"		The type of stack to plot. The normal option sums up all the points within the category or group to determine the stack value. On the other hand, the 100% option always sets the stack value to 100% (1.00), with individual points represented as percentages within the category or group.