class_docstr: Base forecaster template class.
  
  The base forecaster specifies the methods and method signatures that all forecasters
  have to implement.
  
  Specific implementations of these methods is deferred to concrete forecasters.
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docstr: Cut-off = "present time" state of forecaster.
  
  Returns
  -------
  cutoff : pandas compatible index element, or None
      pandas compatible index element, if cutoff has been set; None otherwise
docstr_tok: ["Cut-off","=","``","present","time","''","state","of","forecaster",".","Returns","--","--","--","-","cutoff",":","pandas","compatible","index","element",",","or","None","pandas","compatible","index","element",",","if","cutoff","has","been","set",";","None","otherwise"]
code: def cutoff(self):
      """Cut-off = "present time" state of forecaster.
  
      Returns
      -------
      cutoff : pandas compatible index element, or None
          pandas compatible index element, if cutoff has been set; None otherwise
      """
      if not hasattr(self, "_cutoff"):
          return None
      else:
          return self._cutoff
  
imports: from copy import deepcopy
  from itertools import product
  import numpy
  import pandas
  from sktime.base import BaseEstimator
  from sktime.datatypes import VectorizedDF, check_is_scitype, convert_to, get_cutoff, mtype_to_scitype, scitype_to_mtype, update_data
  from sktime.forecasting.base._fh import ForecastingHorizon
  from sktime.utils.datetime import _shift
  from sktime.utils.validation._dependencies import _check_estimator_deps
  from sktime.utils.validation.forecasting import check_alpha, check_cv, check_fh, check_X
  from sktime.utils.validation.series import check_equal_time_index
  from sktime.utils.warnings import warn
label_desc: Use image node_id 24 for calling the BaseForecaster obj's underlying member method code with example usage: obj.cutoff() and returns: None, self