class_docstr: Base class for ``ModelFrame`` and ``ModelFrameGroupBy``
class_docstr_tok: ["Base","class","for","``","ModelFrame","``","and","``","ModelFrameGroupBy","``"]
docstr: Return most recently used estimator
  
  Returns
  -------
  estimator : estimator
docstr_tok: ["Return","most","recently","used","estimator","Returns","--","--","--","-","estimator",":","estimator"]
code: def estimator(self):
      """
      Return most recently used estimator
  
      Returns
      -------
      estimator : estimator
      """
      if not hasattr(self, "_estimator"):
          self._estimator = None
      return self._estimator
  
imports: import warnings
  import pandas.compat
  import pandas_ml.misc
  from pandas_ml.compat import Appender
label_desc: Use image node_id 1 for calling the ModelPredictor obj's underlying member method code with example usage: obj.estimator() and returns: self