Denotes whether cell and data prefetching are enabled.
- iOS 10.0+
- tvOS 10.0+
true, the collection view requests cells in advance of when they will be displayed, spreading the rendering over multiple layout passes. When
false, the cells are requested as they are needed for display, often with multiple cells being requested in the same render loop. Setting this property to
false also disables data prefetching. The default value of this property is