private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.visionai.v1.FacetValue,
            com.google.cloud.visionai.v1.FacetValue.Builder,
            com.google.cloud.visionai.v1.FacetValueOrBuilder>
        getValueFieldBuilder() {
      if (valueBuilder_ == null) {
        if (!(bucketValueCase_ == 2)) {
          bucketValue_ = com.google.cloud.visionai.v1.FacetValue.getDefaultInstance();
        }
        valueBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.visionai.v1.FacetValue,
                com.google.cloud.visionai.v1.FacetValue.Builder,
                com.google.cloud.visionai.v1.FacetValueOrBuilder>(
                (com.google.cloud.visionai.v1.FacetValue) bucketValue_,
                getParentForChildren(),
                isClean());
        bucketValue_ = null;
      }
      bucketValueCase_ = 2;
      onChanged();
      return valueBuilder_;
    }
<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