src/vs/editor/contrib/hover/browser/marginHover.ts/MarginHoverWidget/startShowingAt
class MarginHoverWidget:	public startShowingAt(lineNumber: number): void {
		if (this._computer.lineNumber === lineNumber) {
			// We have to show the widget at the exact same line number as before, so no work is needed
			return;
		}

		this._hoverOperation.cancel();

		this.hide();

		this._computer.lineNumber = lineNumber;
		this._hoverOperation.start(HoverStartMode.Delayed);
	}