如何在MarkerClusterGroup中设置每个集群的选项

// 创建地图对象
var map = L.map('map');

// 创建MarkerClusterGroup对象
var markerClusterGroup = L.markerClusterGroup();

// 将MarkerClusterGroup对象添加到地图上
map.addLayer(markerClusterGroup);

// 创建标记对象
var marker1 = L.marker([51.5, -0.09]);
var marker2 = L.marker([51.6, -0.1]);
var marker3 = L.marker([51.7, -0.11]);

// 将标记添加到MarkerClusterGroup中
markerClusterGroup.addLayer(marker1);
markerClusterGroup.addLayer(marker2);
markerClusterGroup.addLayer(marker3);

// 设置MarkerClusterGroup的选项
markerClusterGroup.setOptions({
  maxClusterRadius: 50,
  iconCreateFunction: function(cluster) {
    var childCount = cluster.getChildCount();
    var iconSize = childCount < 10 ? [40, 40] : [50, 50];
    return L.divIcon({ html: '<div style="background-color: red; width: ' + iconSize[0] + 'px; height: ' + iconSize[1] + 'px; border-radius: 50%;"><span style="line-height: ' + iconSize[0] + 'px; text-align: center; color: white; font-size: 14px;">' + childCount + '</span></div>' });
  },
  spiderfyOnMaxZoom: true,
  showCoverageOnHover: true,
  zoomToBoundsOnClick: true
});