custom(of:label:_:)
Computes a custom aggregation and adds it to the group.
Declaration
mutating func custom(of metric: Metric, label: String, _ body: ([Double]) -> Double)Parameters
- metric:
The metric to aggregate.
- label:
The label for this statistic in the aggregated results.
- body:
A closure that receives the metric’s values and returns a computed statistic.