src/vs/workbench/contrib/markers/browser/markersTreeViewer.ts/MarkersViewModel/onMarkerMouseHover
class MarkersViewModel:	onMarkerMouseHover(marker: Marker): void {
		this.hoveredMarker = marker;
		this.hoverDelayer.trigger(() => {
			if (this.hoveredMarker) {
				const model = this.getViewModel(this.hoveredMarker);
				if (model) {
					model.showLightBulb();
				}
			}
		});
	}