test/plugins/removeUnknownsAndDefaults.05.svg

<svg xmlns="http://www.w3.org/2000/svg">
    <g fill="red">
        <g fill="red">
            <g fill="green">
                <g fill="green">
                    <path fill="red" d="M18.8 86.9l39.2"/>        
                </g>
            </g>
            <path fill="red" d="M118.8 186.9l79.2"/>
        </g>
    </g>
</svg>

@@@

<svg xmlns="http://www.w3.org/2000/svg">
    <g fill="red">
        <g>
            <g fill="green">
                <g>
                    <path fill="red" d="M18.8 86.9l39.2"/>
                </g>
            </g>
            <path d="M118.8 186.9l79.2"/>
        </g>
    </g>
</svg>