@java.lang.Override
  public com.google.cloud.vertexai.api.VertexAISearchOrBuilder getVertexAiSearchOrBuilder() {
    if (sourceCase_ == 2) {
      return (com.google.cloud.vertexai.api.VertexAISearch) source_;
    }
    return com.google.cloud.vertexai.api.VertexAISearch.getDefaultInstance();
  }
<pre>
Set to use data source powered by Vertex AI Search.
</pre>

<code>.google.cloud.vertexai.v1.VertexAISearch vertex_ai_search = 2;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Retrieval.java