Searches a string for an occurrence of a substring and returns the UTF-8 byte index of the first occurrence. If the substring is not found, returns -1.
3.4
https://www.mongodb.com/docs/manual/reference/operator/aggregation/indexOfBytes/#mongodb-expression-exp.-indexOfBytes
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Searches a string for an occurrence of a substring and returns the UTF-8 byte index of the first occurrence. If the substring is not found, returns -1.