code: def __init__(self, estimator):
      self.estimator = estimator
  
imports: import warnings
  from pprint import pprint
  import numpy
  from sklearn import set_config
  from sklearn.base import BaseEstimator, ClassifierMixin, MetaEstimatorMixin, RegressorMixin, TransformerMixin, clone
  from sklearn.linear_model import LinearRegression
  from sklearn.utils import metadata_routing
  from sklearn.utils.metadata_routing import MetadataRouter, MethodMapping, get_routing_for_object, process_routing
  from sklearn.utils.validation import check_is_fitted
label_desc: Use image node_id 1 to create a new MetaRegressor object from inherited base classes: MetaEstimatorMixin, RegressorMixin, BaseEstimator with example: obj = MetaRegressor(estimator)