Convert a navigation target — the mark hanging off an am5 dataItem, or the
sprite a ribbon was resolved to — into an overlay rectangle in root-container
pixels, clipped to the plot area. Returns null when geometry is unavailable
or fully outside the plot, in which case the caller should clear the overlay.
Convert a navigation target — the mark hanging off an am5 dataItem, or the sprite a ribbon was resolved to — into an overlay rectangle in root-container pixels, clipped to the plot area. Returns
nullwhen geometry is unavailable or fully outside the plot, in which case the caller should clear the overlay.