如何获取命令"L.control.layers“的单选按钮信息？

var map = L.map('map').setView([51.505, -0.09], 13);

var baseLayer = L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors'
}).addTo(map);

var overlayLayer = L.tileLayer('https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png', {
    attribution: 'Map data &copy; <a href="https://www.opentopomap.org/">OpenTopoMap</a> contributors'
}).addTo(map);

var controlLayers = L.control.layers({
    'Base Layer': baseLayer,
    'Overlay Layer': overlayLayer
}).addTo(map);

var overlays = controlLayers.getOverlays();

for (var layerName in overlays) {
    var layer = overlays[layerName];
    var inputElement = layer._input;
    var labelElement = layer._label;

    var layerName = labelElement.textContent;
    var isChecked = inputElement.checked;

    console.log("Layer Name: " + layerName);
    console.log("Is Checked: " + isChecked);
}