group

fun <TExpression> group(id: TExpression, vararg fieldAccumulators: BsonField): Bson

fun <TExpression> group(id: TExpression, fieldAccumulators: List<BsonField>): Bson

Creates a $group pipeline stage for the specified filter

the $group pipeline stage

the expression type

the id expression for the group

fieldAccumulators

zero or more field accumulator pairs