private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vertexai.api.Segment,
            com.google.cloud.vertexai.api.Segment.Builder,
            com.google.cloud.vertexai.api.SegmentOrBuilder>
        getSegmentFieldBuilder() {
      if (segmentBuilder_ == null) {
        segmentBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vertexai.api.Segment,
                com.google.cloud.vertexai.api.Segment.Builder,
                com.google.cloud.vertexai.api.SegmentOrBuilder>(
                getSegment(), getParentForChildren(), isClean());
        segment_ = null;
      }
      return segmentBuilder_;
    }
<pre>
Segment of the content this support belongs to.
</pre>

<code>optional .google.cloud.vertexai.v1.Segment segment = 1;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GroundingSupport.java