code: def evaluate(self, x, y):
      with self.xgboost_lock:
          return float(
              self.get_booster()
              .eval(xgboost.DMatrix(x, label=y))
              .split(":")[-1]
          )
  
imports: from __future__ import absolute_import
  import inspect
  import logging
  import warnings
  import threading
  import lore.env
  import lore.estimators
  from lore.util import timed, before_after_callbacks
  import xgboost
label_desc: Use image node_id 7 for calling the Base obj's underlying member method code with example usage: obj.evaluate(x, y) and returns: float