class_docstr: An action was called that requires a fitted model.
code: def from_estimator(klass, estimator, method=None):
      method = method or "this method"
      message = (
          "this {} instance is not fitted yet, please call fit "
          "with the appropriate arguments before using {}"
      ).format(estimator.__class__.__name__, method)
      return klass(message)
  
label_desc: Use image node_id 1 for calling the NotFitted obj's underlying member method code with example usage: obj.from_estimator(klass, estimator, method) and returns: klass