https://www.mongodb.com/es/docs/v4.4/reference/operator/aggregation/strlenbytes/
$strLenBytes (aggregation) - MongoDB Manual v4.4 - MongoDB Docs
aggregationmongodbmanualdocs
https://docs.spring.io/spring-data/mongodb/docs/4.4.12/api/org/springframework/data/mongodb/core/aggregation/StringOperators.StrLenBytes.html
StringOperators.StrLenBytes (Spring Data MongoDB 4.4.12 API)
declaration: package: org.springframework.data.mongodb.core.aggregation, class: StringOperators, class: StrLenBytes
spring data mongodbapi