private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vertexai.api.Tool.GoogleSearch,
            com.google.cloud.vertexai.api.Tool.GoogleSearch.Builder,
            com.google.cloud.vertexai.api.Tool.GoogleSearchOrBuilder>
        getGoogleSearchFieldBuilder() {
      if (googleSearchBuilder_ == null) {
        googleSearchBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vertexai.api.Tool.GoogleSearch,
                com.google.cloud.vertexai.api.Tool.GoogleSearch.Builder,
                com.google.cloud.vertexai.api.Tool.GoogleSearchOrBuilder>(
                getGoogleSearch(), getParentForChildren(), isClean());
        googleSearch_ = null;
      }
      return googleSearchBuilder_;
    }
<pre>
Optional. GoogleSearch tool type.
Tool to support Google Search in Model. Powered by Google.
</pre>

<code>
.google.cloud.vertexai.v1.Tool.GoogleSearch google_search = 7 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Tool.java