public Builder setRagRetrievalConfig(
        com.google.cloud.vertexai.api.RagRetrievalConfig.Builder builderForValue) {
      if (ragRetrievalConfigBuilder_ == null) {
        ragRetrievalConfig_ = builderForValue.build();
      } else {
        ragRetrievalConfigBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
<pre>
Optional. The retrieval config for the Rag query.
</pre>

<code>
.google.cloud.vertexai.v1.RagRetrievalConfig rag_retrieval_config = 6 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/VertexRagStore.java