public Builder clearScaleIn() {
        bitField0_ = (bitField0_ & ~0x00000002);
        scaleIn_ = 0;
        onChanged();
        return this;
      }
<pre>
Required. The utilization triggering the scale-in operation in percent.
</pre>

<code>int32 scale_in = 2 [(.google.api.field_behavior) = REQUIRED];</code>

@return This builder for chaining.
java-vmwareengine/proto-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/AutoscalingSettings.java