if (dominant == null || recessive == null) {
            return;
        }

        recessive.setSourceLevel(recessiveSourceLevel);

        shallowMerge(dominant.getToolchains(), recessive.getToolchains(), recessiveSourceLevel);
    }

    private void shallowMerge(
            List<ToolchainModel> dominant, List<ToolchainModel> recessive, String recessiveSourceLevel) {