public Builder clearValue() {
      if (valueBuilder_ == null) {
        if (bucketValueCase_ == 2) {
          bucketValueCase_ = 0;
          bucketValue_ = null;
          onChanged();
        }
      } else {
        if (bucketValueCase_ == 2) {
          bucketValueCase_ = 0;
          bucketValue_ = null;
        }
        valueBuilder_.clear();
      }
      return this;
    }
<pre>
Singular value.
</pre>

<code>.google.cloud.visionai.v1.FacetValue value = 2;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/FacetBucket.java