List<UpgradedProperty> baselineUpgradedProperties = UpgradedProperties.parse(params.get(BASELINE_UPGRADED_PROPERTIES_KEY));
        context.putUserData(CURRENT_ACCESSORS_OF_UPGRADED_PROPERTIES, diff(
            mapCurrentAccessorsOfUpgradedProperties(currentUpgradedProperties),
            mapCurrentAccessorsOfUpgradedProperties(baselineUpgradedProperties)
        ));