in telemetry/csharp/AwsToolkit.Telemetry.Events/Core/MetricDatumExtensionMethods.cs [14:22]
public static void AddMetadata(this MetricDatum metricDatum, string key, string value)
{
if (string.IsNullOrWhiteSpace(value))
{
return;
}
metricDatum.Metadata[key] = value;
}