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    Optimistically Update Multiple Values in State Using React's setState


    We'll add a method to our class-based React component and immediately update state before firing off our request. Using a setState updater function, we will update component state based on previous state and toggle the "liked" status of a tweet upon the user clicking the heart icon. We will simultaneously increment or decrement the target tweet's likes property and appropriately add or remove the tweetId from the likedTweets array.