public Builder clearDatetimeBucketSpec() {
      if (datetimeBucketSpecBuilder_ == null) {
        if (rangeFacetConfigCase_ == 7) {
          rangeFacetConfigCase_ = 0;
          rangeFacetConfig_ = null;
          onChanged();
        }
      } else {
        if (rangeFacetConfigCase_ == 7) {
          rangeFacetConfigCase_ = 0;
          rangeFacetConfig_ = null;
        }
        datetimeBucketSpecBuilder_.clear();
      }
      return this;
    }
<pre>
Datetime range facet bucket config.
</pre>

<code>.google.cloud.visionai.v1.FacetProperty.DateTimeBucketSpec datetime_bucket_spec = 7;
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/FacetProperty.java