The current column that fired the event. If the value is string, it indicates a column group and the value is the group caption. If the value is number, it indicates a single column and the index is in the IGrid.columns collection
The new value of changed column property
The old value of changed column property
Indicates the column change type
Defines arguments of the event that occurs when the user changes the column visibility, pinned option, or column width, or expands or collapses the column group from UI