public com.google.cloud.vertexai.api.VertexRagStore.Builder getVertexRagStoreBuilder() {
      return getVertexRagStoreFieldBuilder().getBuilder();
    }
<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