Arcgis ClosestFacilityParameters怎么知道获取的最佳线路是属于哪个id的?

参考文献：https://developers.arcgis.com/javascript/latest/api-reference/esri-rest-support-ClosestFacilityParameters.html

<link
  rel="stylesheet"
  href="https://js.arcgis.com/4.24/esri/themes/light/main.css"
/>
<script src="https://js.arcgis.com/4.24/"></script>

<script>
  require([
    "esri/config",
    "esri/Map",
    "esri/views/MapView",
    "esri/Graphic",
    "esri/layers/GraphicsLayer",
    "esri/rest/closestFacility",
    "esri/rest/support/ClosestFacilityParameters",
    "esri/rest/support/FeatureSet",
    "esri/symbols/Symbol",
  ], function (
    esriConfig,
    Map,
    MapView,
    Graphic,
    GraphicsLayer,
    closestFacility,
    ClosestFacilityParameters,
    FeatureSet,
    Symbol
  ) {
    esriConfig.apiKey = "YOUR_API_KEY";

    const routeSymbol = {
      type: "simple-line",
      color: [50, 150, 255, 0.75],
      width: "5",
    };

    const facilities = [
      {
        id: "a",
        center: [-122.67484, 45.52087],
      },
      {
        id: "b",
        center: [-122.68365, 45.52327],
      },
      {
        id: "c",
        center: [-122.66406, 45.52378],
      },
      {
        id: "d",
        center: [-122.6631, 45.52093],
      },
      {
        id: "e",
        center: [-122.66208, 45.5197],
      },
      {
        id: "f",
        center: [-122.66247, 45.51845],
      },
      {
        id: "g",
        center: [-122.66299, 45.51827],
      },
    ];

    const routesLayer = new GraphicsLayer();
    const facilitiesLayer = new GraphicsLayer();

    const map = new Map({
      basemap: "arcgis-streets",
      layers: [routesLayer, facilitiesLayer],
    });

    const view = new MapView({
      container: "viewDiv",
      map: map,
      center: [-122.67584, 45.52087],
      zoom: 14,
      constraints: {
        snapToZoom: false,
      },
    });

    view.popup.actions = [];

    view.when(() => {
      addFacilityGraphics();
      findClosestFacility(
        addStartGraphic(view.center),
        facilitiesLayer.graphics
      );
    });

    view.on("click", (event) => {
      view.hitTest(event).then((response) => {
        if (response.results.length === 1) {
          findClosestFacility(
            addStartGraphic(event.mapPoint),
            facilitiesLayer.graphics
          );
        }
      });
    });

    function findClosestFacility(startFeature, facilityFeatures) {
      const params = new ClosestFacilityParameters({
        incidents: new FeatureSet({
          features: [startFeature],
        }),
        facilities: new FeatureSet({
          features: facilityFeatures.toArray(),
        }),
        returnRoutes: true,
        returnFacilities: true,
        defaultTargetFacilityCount: 3,
      });

      const url =
        "https://route-api.arcgis.com/arcgis/rest/services/World/ClosestFacility/NAServer/ClosestFacility_World";

      closestFacility.solve(url, params).then(
        (results) => {
          showRoutes(results.routes);
        },
        (error) => {
          console.log(error.details);
        }
      );
    }

    function addStartGraphic(point) {
      view.graphics.removeAll();
      const graphic = new Graphic({
        symbol: {
          type: "simple-marker",
          color: [255, 255, 255, 1.0],
          size: 8,
          outline: {
            color: [50, 50, 50],
            width: 1,
          },
        },
        geometry: point,
      });
      view.graphics.add(graphic);
      return graphic;
    }

    function addFacilityGraphics() {
      facilities.forEach((point) => {
        facilitiesLayer.graphics.add(
          new Graphic({
            id: point.id
            symbol: {
              type: "web-style",
              name: "grocery-store",
              styleName: "Esri2DPointSymbolsStyle",
            },
            geometry: {
              type: "point",
              longitude: point.center[0],
              latitude: point.center[1],
              spatialReference: view.spatialReference,
            },
          })
        );
      });
    }

    function showRoutes(routes) {
      // Show the routes to the closest facilities
      routesLayer.removeAll();
      routes.forEach((route, i) => {
        route.symbol = routeSymbol;
        routesLayer.add(route);
      });
    }
  });
</script>

view.when(() => {
addFacilityGraphics();
findClosestFacility(
addStartGraphic(view.center),
facilitiesLayer.graphics
);
});
根据view.center和facilitiesLayer.graphics参数来判断