class_docstr: Mixin class for constructing Mock estimators.
docstr: Append an item to the log.
  
  State change:
  self.log - `value` is appended to the list self.log
  
  Parameters
  ----------
  value : any object
code: def add_log_item(self, value):
      """Append an item to the log.
  
      State change:
      self.log - `value` is appended to the list self.log
  
      Parameters
      ----------
      value : any object
      """
      if not hasattr(self, "_MockEstimatorMixin__log"):
          self._MockEstimatorMixin__log = [value]
      else:
          self._MockEstimatorMixin__log = (
              self._MockEstimatorMixin__log + [value]
          )
  
file_path: sktime/sktime/utils/estimators/_base.py
imports: import re
  from copy import deepcopy
  from functools import wraps
  from inspect import getcallargs, getfullargspec
  from sktime.base import BaseEstimator
label_desc: Use image node_id 2 for calling the _MockEstimatorMixin obj's underlying member method code with example usage: obj.add_log_item(value) without return types