In a UIKit collection view with image cells, fast scrolling makes the previous request's response flash on a reused cell before it changes. What would you cancel when the cell is reused?
The cell keeps its in-flight image load Task in a property, and in prepareForReuse() it cancels that Task and clears the image view. Then configure starts a new Task for the new URL, and inside the Task the image is assigned only after checking for cancellation, so a late response never lands on the wrong cell.
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