lost property
Lost is the count of facts the sink irrecoverably dropped since boot (warehouse.go). It is reported on the DEGRADED report too, and deliberately: a warehouse that is unreachable is exactly when facts start failing their deliveries, so suppressing the number here would hide it precisely when it moves. ANY NON-ZERO VALUE IS AN ALARM — it counts data the endpoint already answered 200 for.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
Loss? lost;