Takes two arrays and returns true when the first array is a subset of the second, including when the first array equals the second array, and false otherwise.
https://www.mongodb.com/docs/manual/reference/operator/aggregation/setIsSubset/#mongodb-expression-exp.-setIsSubset
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Takes two arrays and returns true when the first array is a subset of the second, including when the first array equals the second array, and false otherwise.