https://docs.spring.io/spring-data/mongodb/docs/4.4.12/api/org/springframework/data/mongodb/core/aggregation/AccumulatorOperators.ExpMovingAvg.html
AccumulatorOperators.ExpMovingAvg (Spring Data MongoDB 4.4.12 API)
declaration: package: org.springframework.data.mongodb.core.aggregation, class: AccumulatorOperators, class: ExpMovingAvg
spring data mongodbapi