flutter_svg/example/assets/simple/hidden.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 120 120">
    <g fill="green" display="none">
        <rect width="100" height="50" x="10" y="10" fill="red" stroke="blue" stroke-opacity=".3" />
    </g>
    <rect visibility="hidden" width="100" height="50" x="10" y="70" fill="rgb(255, 0, 0)" stroke="blue" stroke-opacity=".3" rx="20" ry="15"/>
    <rect width="100" height="50" x="10" y="70" fill="rgb(255, 0, 0)" stroke="red" stroke-opacity=".3" rx="20" ry="15"/>
</svg>