Common
```kotlin
sealed interface PrefetchHandle
```
A handle to control some aspects of the prefetch request.
## Functions
cancel
```kotlin
fun cancel()
```
Notifies the prefetcher that previously scheduled item is no longer needed. If the item
was precomposed already it will be disposed.
markAsUrgent
```kotlin
fun markAsUrgent()
```
Marks this prefetch request as urgent, which is a way to communicate that the requested
item is expected to be needed during the next frame.
For urgent requests we can proceed with doing the prefetch even if the available time in
the frame is less than we spend on similar prefetch requests on average.