code: def get_support(self, indices=False):
      mask = [
          True if f not in self.features_to_drop_ else False
          for f in self.feature_names_in_
      ]
      return mask if not indices else np.where(mask)[0]
  
imports: import numpy
  import pytest
  from sklearn.exceptions import NotFittedError
  from sklearn.impute import SimpleImputer
  from sklearn.pipeline import Pipeline
  from sklearn.preprocessing import PolynomialFeatures
  from feature_engine._base_transformers.mixins import GetFeatureNamesOutMixin
  from feature_engine.dataframe_checks import check_X
label_desc: Use image node_id 3 for calling the MockSelector obj's underlying member method code with example usage: obj.get_support(indices) and returns: unknown