fn normalize_features(
original_features: Option<&BTreeMap<FeatureName, FeatureDefinition>>,
) -> CargoResult<Option<BTreeMap<FeatureName, FeatureDefinition>>>fn normalize_features(
original_features: Option<&BTreeMap<FeatureName, FeatureDefinition>>,
) -> CargoResult<Option<BTreeMap<FeatureName, FeatureDefinition>>>