<svg xmlns="http://www.w3.org/2000/svg">
<defs>
<g display="none">
<marker id="testMarker" markerWidth="100" markerHeight="100" style="display:inherit">
<rect width="100" height="100" fill="green" />
</marker>
</g>
</defs>
<path d="M 10 10 L 0 0" marker-end="url(#testMarker)" />
</svg>