pub(open) trait MetricSink {
  fn emit(Self, MetricPoint) -> Unit
}

pub(open) trait Probe {
  fn on_trace(Self, 
@mokomoking2501/lockwire/trace.TraceEvent
TraceEvent) -> Unit
  fn on_metric(Self, MetricPoint) -> Unit
}

pub(open) trait TraceSink {
  fn write(Self, 
@mokomoking2501/lockwire/trace.TraceEvent
TraceEvent) -> Unit
}

pub(all) struct MetricPoint {
  name : String
  vtime : 
@mokomoking2501/lockwire/core.VTime
VTime
  value : Int64
  unit : String
} derive(Eq, 
@moonbitlang/core/debug.Debug
Debug)

pub(all) struct TimelineProbe {
  events : Array[
@mokomoking2501/lockwire/trace.TraceEvent
TraceEvent]
  metrics : Array[MetricPoint]
} derive(
@moonbitlang/core/debug.Debug
Debug)

fn package_id() -> String