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# Function nemo_relay_metric_json

> Emit an atomic metric measurement mark from canonical JSON.

Generated from `cargo doc --no-deps -p nemo-relay -p nemo-relay-adaptive -p nemo-relay-pii-redaction -p nemo-relay-ffi -p nemo-relay-types -p nemo-relay-plugin -p nemo-relay-worker-proto -p nemo-relay-worker`.

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Emit an atomic metric measurement mark from canonical JSON.

`measurements_json` must be a nonempty JSON array using Relay's canonical `MetricMeasurement` shape. Relay validates the complete array before emitting the metric mark.

## Safety

`name` and `measurements_json` must be valid non-null C strings. Optional pointers may be null and otherwise must remain valid for the call.