src/vs/editor/contrib/hover/hoverTypes.ts/HoverForeignElementAnchor/canAdoptVisibleHover
class HoverForeignElementAnchor:	public canAdoptVisibleHover(lastAnchor: HoverAnchor, showAtPosition: Position): boolean {
		return (lastAnchor.type === HoverAnchorType.ForeignElement && this.owner === lastAnchor.owner);
	}