code: def predict(self, ctx: Context, predict_data: DataFrame) -> None:
      predict_leaf_host(ctx, self._trees, predict_data)
  
imports: import random
  import os
  from fate.ml.ensemble.learner.decision_tree.hetero.host import HeteroDecisionTreeHost
  from fate.ml.ensemble.algo.secureboost.hetero._base import HeteroBoostingTree
  from fate.arch import Context
  from fate.arch.dataframe import DataFrame
  from fate.ml.ensemble.utils.binning import binning
  from fate.ml.ensemble.algo.secureboost.common.predict import predict_leaf_host
  from fate.ml.ensemble.learner.decision_tree.tree_core.decision_tree import GUEST_FEAT_ONLY, ALL_FEAT
  import logging
label_desc: Use image node_id 6 for calling the HeteroSecureBoostHost obj's underlying member method code with example usage: obj.predict(ctx, predict_data) without return types