Upon collapsing the value of a Query Element, we may want to trigger a particular action (such as recalculating a value, changing the color of a text, interacting with another control, etc.). This property contains the name of the variable based on the QueryViewerItemCollapseData SDT that can be used in the ItemCollapse Event.
Name of the variable that will implement the event’s inherent properties. This is the default value.
Structure of QueryViewerItemCollapseData SDT
Item Expand Data property