code: def predict_proba_one(self, x):
      ex = "| " + self._format_x(x)
      y_pred = self.vw.predict(ex)
      return {True: y_pred, False: 1.0 - y_pred}
  
file_path: river/benchmarks/model_adapters/vw.py
imports: from __future__ import annotations
  from vowpalwabbit import pyvw
  from river import base
label_desc: Use image node_id 2 for calling the VW2RiverClassifier obj's underlying member method code with example usage: obj.predict_proba_one(x) and returns: dict