code: def fit(self, X: DataFrame):
      self.valid_classes = self.get_valid_classes(
          X=X, label=self.label, threshold=self.threshold
      )
  
file_path: autogluon/core/src/autogluon/core/data/cleaner.py
imports: import logging
  from pandas import DataFrame
  from autogluon.core.constants import BINARY, MULTICLASS, QUANTILE, REGRESSION
label_desc: Use image node_id 2 for calling the CleanerMulticlass obj's underlying member method code with example usage: obj.fit(X) without return types