@java.lang.Override
    public com.google.cloud.vertexai.api.VertexRagStoreOrBuilder getVertexRagStoreOrBuilder() {
      if ((sourceCase_ == 4) && (vertexRagStoreBuilder_ != null)) {
        return vertexRagStoreBuilder_.getMessageOrBuilder();
      } else {
        if (sourceCase_ == 4) {
          return (com.google.cloud.vertexai.api.VertexRagStore) source_;
        }
        return com.google.cloud.vertexai.api.VertexRagStore.getDefaultInstance();
      }
    }
<pre>
Set to use data source powered by Vertex RAG store.
User data is uploaded via the VertexRagDataService.
</pre>

<code>.google.cloud.vertexai.v1.VertexRagStore vertex_rag_store = 4;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/Retrieval.java