public Builder clearChunkType() {
      chunkTypeCase_ = 0;
      chunkType_ = null;
      onChanged();
      return this;
    }
<pre>
Grounding chunk.
</pre>

Protobuf type {@code google.cloud.vertexai.v1.GroundingChunk}
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GroundingChunk.java