OptionaldataThe datasource associated with the event (for rowLoadFailed events).
OptionaldirectionThe direction of the event, if applicable.
OptionalitemThe item index involved in the event, if any.
OptionalpercentThe percent completion for the event, if applicable.
OptionalpreventOptionalrowThe row associated with the event (for rowLoadFailed events).
The row index involved in the event.
The type of collection event.
CollectionViewEvent extends ViewEvent for collection view-specific events.