Bar chart empty visualization from marking message

Description: Set the message shown when marking results in an empty visualization.
Assumptions: myVis is a visualization type script parameter.

from Spotfire.Dxp.Application.Visuals import VisualContent
myVisVC = myVis.As[VisualContent]()

myVisVC.Data.LimitingMarkingsEmptyMessage = "Select items on the chart"
print "Marking message: " + myVisVC.Data.LimitingMarkingsEmptyMessage