public com.google.cloud.visionai.v1.FacetValue getBucketStart() {
        if (bucketStartBuilder_ == null) {
          return bucketStart_ == null
              ? com.google.cloud.visionai.v1.FacetValue.getDefaultInstance()
              : bucketStart_;
        } else {
          return bucketStartBuilder_.getMessage();
        }
      }
<pre>
Lower bound of the bucket. NOTE: Only integer type is currently supported
for this field.
</pre>

<code>.google.cloud.visionai.v1.FacetValue bucket_start = 1;</code>

@return The bucketStart.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/FacetProperty.java