3 Composed Shadow Tree will be:
7 svg id=svg-in-shadow-tree class=[object SVGAnimatedString]
10 Moving mouse from shadow-host/svg-in-shadow-tree to top
13 @svg-in-shadow-tree (target: svg-in-shadow-tree) (related: top)
14 @shadow-root (target: svg-in-shadow-tree) (related: top)
15 @top (target: shadow-host) (related: top)
18 @top (target: top) (related: shadow-host)
19 PASS successfullyParsed is true