custom function for returning tooltip HTML passed an array or object with the data, and then the default tooltip markup
padding between the bar items and the tooltip
a function to format the tooltip values
vertical offset for title tooltip placement. < 0 will shift the tooltip above title, > 0 shifts vertically down
max width of title tooltip relative to the width of the chart-svg (percentage should be < 1)
Generated using TypeDoc
extends tooltip for bar tooltip