private void ensureWebSearchQueriesIsMutable() {
      if (!webSearchQueries_.isModifiable()) {
        webSearchQueries_ = new com.google.protobuf.LazyStringArrayList(webSearchQueries_);
      }
      bitField0_ |= 0x00000001;
    }
<pre>
Metadata returned to client when grounding is enabled.
</pre>

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