class_docstr: Accessor to ``sklearn.preprocessing``.
docstr: Check whether estimator should preserve existing column names
docstr_tok: ["Check","whether","estimator","should","preserve","existing","column","names"]
code: def _keep_existing_columns(self, estimator):
      """
      Check whether estimator should preserve existing column names
      """
      return estimator.__class__ in _keep_col_classes
  
file_path: pandas-ml/pandas_ml/skaccessors/preprocessing.py
imports: import numpy
  from pandas_ml.core.accessor import _AccessorMethods, _attach_methods
  from pandas_ml.compat import _SKLEARN_INSTALLED, is_integer_dtype
label_desc: Use image node_id 1 for calling the PreprocessingMethods obj's underlying member method code with example usage: obj._keep_existing_columns(estimator) and returns: unknown