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* 1. Why is there only one Mutation component needed for the updateSubscription instead of two which were needed for the Star/Unstar feature?

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* 2. What is optimistic UI?

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* 3. Why does the count of watches update immediately as well?

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* 4. What can be done to keep Mutation components concise?

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* 5. How would you rate this section?

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* 6. What was the hardest part in this section?

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* 7. Do you have any suggestions for improving this section?

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