@CustomType.Setter
        public Builder metricName(String metricName) {
            if (metricName == null) {
              throw new MissingRequiredPropertyException("ExternalMetricStatus", "metricName");
            }
            this.metricName = metricName;
            return this;
        }
@return metricSelector is used to identify a specific time series within a given metric.
sdk/java/src/main/java/com/pulumi/kubernetes/autoscaling/v2beta1/outputs/ExternalMetricStatus.java