javascript - Openlayers 4 - get all child layers in a layer group

How can I get all child layers of a given layer group in Openlayers?

I go as far as establishing that a given layer is in fact a group, but then I get stumped:

// Handle visibility control
$('i').on('click', function() {
    var layername = $(this).closest('li').data('layerid');

    var layer = findBy(map.getLayerGroup(), 'name', layername);
    var flagGroup = layer instanceof ol.layer.Group;
    if (flagGroup) {
       ...
    }
});

Answer

childLayers = layer.getLayers()

https://openlayers.org/en/latest/apidoc/ol.layer.Group.html#getLayers