public Builder clearSegment() {
      bitField0_ = (bitField0_ & ~0x00000001);
      segment_ = null;
      if (segmentBuilder_ != null) {
        segmentBuilder_.dispose();
        segmentBuilder_ = null;
      }
      onChanged();
      return this;
    }
<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