src/vs/editor/contrib/hover/browser/hoverTypes.ts/HoverRangeAnchor/canAdoptVisibleHover
class HoverRangeAnchor:	public canAdoptVisibleHover(lastAnchor: HoverAnchor, showAtPosition: Position): boolean {
		return (lastAnchor.type === HoverAnchorType.Range && showAtPosition.lineNumber === this.range.startLineNumber);
	}