class_docstr: shared set-up checks and methods across imputers
class_docstr_tok: ["shared","set-up","checks","and","methods","across","imputers"]
code: def _more_tags(self):
      tags_dict = _return_tags()
      tags_dict["allow_nan"] = True
      tags_dict["variables"] = "numerical"
      return tags_dict
  
file_path: feature_engine/feature_engine/imputation/base_imputer.py
imports: import pandas
  from sklearn.base import BaseEstimator, TransformerMixin
  from sklearn.utils.validation import check_is_fitted
  from feature_engine.dataframe_checks import _check_X_matches_training_df, check_X
  from feature_engine._base_transformers.mixins import GetFeatureNamesOutMixin
  from feature_engine.tags import _return_tags
label_desc: Use image node_id 4 for calling the BaseImputer obj's underlying member method code with example usage: obj._more_tags() and returns: tags_dict