Which retail company first introduced the 'Just Walk Out' cashierless technology that allows customers to shop without going through a checkout line?

The retail landscape has been dramatically transformed by technological advancements over the past decade. From cashierless stores to advanced inventory management systems, technology has revolutionized how retailers operate and how customers shop. This trivia question tests your knowledge about a significant milestone in retail technology that changed the industry forever. Can you identify which company pioneered this groundbreaking retail innovation?

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Amazon (with Amazon Go stores)
Walmart (with Walmart+)
Target (with Target Express)
Alibaba (with Hema stores)