code: def _get_return_tags(estimator, return_tags):
      """Fetch a list of all tags for every_entry of all_estimators.
  
      Parameters
      ----------
      estimator:  BaseEstimator, an sktime estimator
      return_tags: list of str,
          names of tags to get values for the estimator
  
      Returns
      -------
      tags: a tuple with all the estimators values for all tags in return tags.
          a value is None if it is not a valid tag for the estimator provided.
      """
      tags = tuple(estimator.get_class_tag(tag) for tag in return_tags)
      return tags
  
file_path: sktime/sktime/registry/_lookup.py
imports: from copy import deepcopy
  from operator import itemgetter
  from pathlib import Path
  import pandas
  from skbase.lookup import all_objects
  from sktime.base import BaseEstimator
  from sktime.registry._base_classes import BASE_CLASS_LIST, BASE_CLASS_LOOKUP, TRANSFORMER_MIXIN_LIST
  from sktime.registry._tags import ESTIMATOR_TAG_REGISTER
label_desc: Use image node_id 3 for calling a global function with example usage: _get_return_tags(estimator, return_tags) and returns: tags