class_docstr: Transformer base class.
class_docstr_tok: ["Transformer","base","class","."]
docstr: Shorthand for _check_X_y with one argument X, see _check_X_y.
code: def _check_X(self, X=None):
      """Shorthand for _check_X_y with one argument X, see _check_X_y."""
      return self._check_X_y(X=X)[0]
  
imports: from itertools import product
  from typing import Union
  import numpy
  import pandas
  from sktime.base import BaseEstimator
  from sktime.datatypes import VectorizedDF, check_is_error_msg, check_is_mtype, check_is_scitype, convert, convert_to, mtype_to_scitype, update_data
  from sktime.datatypes._series_as_panel import convert_to_scitype
  from sktime.utils.sklearn import is_sklearn_classifier, is_sklearn_clusterer, is_sklearn_regressor, is_sklearn_transformer
  from sktime.utils.validation._dependencies import _check_estimator_deps
label_desc: Use image node_id 17 for calling the BaseTransformer obj's underlying member method code with example usage: obj._check_X(X) and returns: self