Can I specify the root node splitting feature in XGBoost? Just what the title says. Suppose I know the feature that I want to be used for splitting for the root node in a tree model in XGBoost; is there a way for me to tell XGBoost to split on this feature at the root node?
I do not have the whole answer, but I believe that xgboost allows warm-starting, which implies starting from a provided point.

xgb.train(…,xgb_model=model_to_start_from)