public Builder clearGoogleSearchRetrieval() {
      bitField0_ = (bitField0_ & ~0x00000008);
      googleSearchRetrieval_ = null;
      if (googleSearchRetrievalBuilder_ != null) {
        googleSearchRetrievalBuilder_.dispose();
        googleSearchRetrievalBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Optional. GoogleSearchRetrieval tool type.
Specialized retrieval tool that is powered by Google search.
</pre>

<code>
.google.cloud.vertexai.v1.GoogleSearchRetrieval google_search_retrieval = 3 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Tool.java