如何获取L.DivIcon leaflet实例

<link rel="stylesheet" href="leaflet.css">
<script src="leaflet.js"></script>

<div id="map"></div>

var mapContainer = document.getElementById('map');
var map = L.map(mapContainer);

var center = L.latLng(51.505, -0.09); // 设置地图中心坐标
var zoomLevel = 13; // 设置缩放级别
map.setView(center, zoomLevel);

var tileLayerUrl = 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png'; // OpenStreetMap瓦片图层URL
var tileLayer = L.tileLayer(tileLayerUrl).addTo(map); // 添加瓦片图层到地图

var divIcon = L.divIcon({ // 创建L.DivIcon实例
  className: 'custom-icon',
  html: '<div class="icon"></div>'
});

var marker = L.marker(center, { // 创建带有L.DivIcon的标记
  icon: divIcon
}).addTo(map);