Read and update data using Room

[biniamhailu]

URL of codelab:
8. Implement Sell item

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In which task and step of the codelab can this issue be found?

On disabling the sell button if the sell button if the quantity is out of stock.

Describe the problem
There is a step missed on the task. We need to open ItemDetailsScreen.kt and on the sell button we have to do enabled = !itemDetailsUiState.outOfStock to disable the button if the item is out of stock.

Thank you for a great introduction to android development!

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