刷新Angular 10 ESRI地图上的图层，而不刷新整个地图

import { Component, OnInit } from '@angular/core';
import { Map, MapView } from '@arcgis/core';

@Component({
  selector: 'app-map',
  templateUrl: './map.component.html',
  styleUrls: ['./map.component.css']
})
export class MapComponent implements OnInit {
  private map: Map;
  private mapView: MapView;

  ngOnInit() {
    this.map = new Map({
      basemap: 'streets'
    });

    this.mapView = new MapView({
      container: 'mapView',
      map: this.map,
      center: [-118.805, 34.027],
      zoom: 13
    });
  }
}

refreshLayer() {
  const layerIndex = 0; // 假设需要刷新第一个图层
  const layer = this.map.layers.getItemAt(layerIndex);
  layer.refresh();
}

<button (click)="refreshLayer()">刷新图层</button>