code: def _finalize_features(self):
          
  
          # First, flag all the enabled items (and thus their dependencies)
          for name, feature in self.features.items():
              enabled = self.feature_is_included(name)
              if enabled or (enabled is None and feature.include_by_default()):
                  feature.include_in(self)
                  self._set_feature(name, 1)
  
          # Then disable the rest, so that off-by-default features don't
          # get flagged as errors when they're required by an enabled feature
          for name, feature in self.features.items():
              if not self.feature_is_included(name):
                  feature.exclude_from(self)
                  self._set_feature(name, 0)
docs: Add/remove features and resolve dependencies between them