code: def transform(self, X):
          '''
          Transform a list of bag features into its bag-of-words representation.
  
          Parameters
          ----------
          X : :class:`skl_groups.features.Features` or list of bag feature arrays
              New data to transform.
  
          Returns
          -------
          X_new : integer array, shape [len(X), kmeans.n_clusters]
              X transformed into the new space.
          '''
          self._check_fitted()
          X = as_features(X, stack=True)
          assignments = self.kmeans_fit_.predict(X.stacked_features)
          return self._group_assignments(X, assignmentsf transform(self, X):
          '''
          Transform a list of bag features into its bag-of-words representation.
  
          Parameters
          ----------
          X : :class:`skl_groups.features.Features` or list of bag feature arrays
              New data to transform.
  
          Returns
          -------
          X_new : integer array, shape [len(X), kmeans.n_clusters]
              X transformed into the new space.
          '''
          self._check_fitted()
          X = as_features(X, stack=True)
          assignments = self.kmeans_fit_.predict(X.stacked_features)
          return self._group_assignments(X, assignments)
docs: Transform a list of bag features into its bag-of-words representation.
  
          Parameters
          ----------
          X : :class:`skl_groups.features.Features` or list of bag feature arrays
              New data to transform.
  
          Returns
          -------
          X_new : integer array, shape [len(X), kmeans.n_clusters]
              X transformed into the new space.