Positioned wrapper element that contains root.dom.
The amCharts root DOM element the overlay aligns to.
Returns the current highlight color (read at draw time).
Draw one rect per provided geometry. Existing rects are cleared first.
Remove all highlight rects (e.g., on resize before recompute).
Detach the overlay from the DOM.
Manages DOM rectangles drawn over an amCharts 5 chart to provide MAIDR-style highlight feedback during keyboard navigation.