public com.google.protobuf.Timestamp.Builder getUpdateTimeBuilder() {
      bitField0_ |= 0x00000004;
      onChanged();
      return getUpdateTimeFieldBuilder().getBuilder();
    }
<pre>
Output only. The UTC time at which the dataset configuration was last
updated. This is auto-populated.
</pre>

<code>
.google.protobuf.Timestamp update_time = 3 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-storageinsights/proto-google-cloud-storageinsights-v1/src/main/java/com/google/cloud/storageinsights/v1/DatasetConfig.java