src/vs/workbench/contrib/markers/browser/markersView.ts/MarkersTree/findMarkerNode
class MarkersTree:	private findMarkerNode(marker: Marker) {
		for (const resourceNode of this.getNode().children) {
			for (const markerNode of resourceNode.children) {
				if (markerNode.element instanceof Marker && markerNode.element.marker === marker.marker) {
					return markerNode.element;
				}
			}
		}

		return null;
	}