for example. I want to create 100 items (rows). each item(row) will have 100% width and height for ((i+1)*10) : item-row 0 = height 10. item-row 1 = height 20. item-row 2 = height 30 this is just for testing purpose, but i will have real fixed heights before loading the collection view. with flow layout I used _:layout:sizeForItemAt: and got set the size from my model-entities how can i achieve this with compositional layout ? I don't want to use Self size cell or/and auto layout. just continue to set the height my self, but enjoy the other benefits of the compositional layout. i will use it on appkit and uikit. thanks.