public Builder clearGroundingChunks() {
      if (groundingChunksBuilder_ == null) {
        groundingChunks_ = java.util.Collections.emptyList();
        bitField0_ = (bitField0_ & ~0x00000004);
        onChanged();
      } else {
        groundingChunksBuilder_.clear();
      }
      return this;
    }
<pre>
List of supporting references retrieved from specified grounding source.
</pre>

<code>repeated .google.cloud.vertexai.v1.GroundingChunk grounding_chunks = 5;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GroundingMetadata.java