groupCaptionTitleFormat property
Displays the title in the group caption summary row using the provided format.
The default format is {ColumnName} : {Key} – {ItemsCount} Items. The name of a ColumnGroup will be replaced by the {ColumnName}, the key in a caption summary row will be replaced by the {Key}, and the number of items grouped in a given group will be replaced by the {ItemsCount}.
Implementation
final String groupCaptionTitleFormat;