Load treelite serialized model directly

[linanqiu]

Is there a way to load a treelite serialized model directly (instead of a xgboost / lightgbm model). It seems possible in the Python interface via load_from_treelite_model (https://docs.rapids.ai/api/cuml/stable/api.html#cuml.ForestInference.load_from_treelite_model). My use case is using my custom R model to train an ensemble, then building a treelite model from that. It'd help immensely if I was able to use that treelite model in R.