code: def _initialize(self, **kwargs):
      super()._initialize(**kwargs)
      self.num_pred_cols_per_model = 1
      if self.problem_type in [MULTICLASS, SOFTCLASS]:
          self.num_pred_cols_per_model = self.num_classes
      elif self.problem_type == QUANTILE:
          self.num_pred_cols_per_model = len(self.quantile_levels)
      if self.base_model_names is None:
          self.base_model_names = self._infer_base_model_names()
      self.features = self._set_stack_columns(
          base_model_names=self.base_model_names
      )
  
imports: import logging
  from autogluon.common.features.types import S_STACK
  from ...constants import MULTICLASS, QUANTILE, SOFTCLASS
  from ..abstract.abstract_model import AbstractModel
  from .ensemble_selection import EnsembleSelection, SimpleWeightedEnsemble
label_desc: Use image node_id 5 for calling the GreedyWeightedEnsembleModel obj's underlying member method code with example usage: obj._initialize() without return types