UseInactiveItemsOpacity: Boolean;
The UseInactiveItemsOpacity property determines whether transparent fill is enabled for inactive bubble chart bubbles.
Use JSON or the setUseInactiveItemsOpacity method to set the property value and the getUseInactiveItemsOpacity method to get the property value.
The property is set to True if transparent fill is enabled for inactive bubble chart bubbles, and False if it is disabled.
This property is under development.