public com.google.common.util.concurrent.ListenableFuture<
            com.google.cloud.vertexai.api.DirectPredictResponse>
        directPredict(com.google.cloud.vertexai.api.DirectPredictRequest request) {
      return io.grpc.stub.ClientCalls.futureUnaryCall(
          getChannel().newCall(getDirectPredictMethod(), getCallOptions()), request);
    }
<pre>
Perform an unary online prediction request to a gRPC model server for
Vertex first-party products and frameworks.
</pre>
java-vertexai/grpc-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/PredictionServiceGrpc.java