class_docstr: Base class for instanes that stack job estimators
docstr: Pop a previous push with index idx
docstr_tok: ["Pop","a","previous","push","with","index","idx"]
code: def pop(self, idx):
      """Pop a previous push with index idx"""
      return self.stack.pop(idx)
  
imports: import warnings
  from abc import abstractmethod
  import numpy
  from ._base_functions import check_stack, check_params
  from ..None import config
  from ..utils.exceptions import ParallelProcessingError
  from ..externals.sklearn.base import clone, BaseEstimator
label_desc: Use image node_id 5 for calling the BaseStacker obj's underlying member method code with example usage: obj.pop(idx) and returns: self