public Builder clearMetricName() {
      metricName_ = getDefaultInstance().getMetricName();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Required. The resource metric name.
Supported metrics:

* For Online Prediction:
* `aiplatform.googleapis.com/prediction/online/accelerator/duty_cycle`
* `aiplatform.googleapis.com/prediction/online/cpu/utilization`
</pre>

<code>string metric_name = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/AutoscalingMetricSpec.java