public static void GetPluginAssembliesFromPluginFolders([NotNull] this PluginHost pluginHost, [NotNull] IList <string> fileNames)
        {
            Assert.ArgumentNotNull(pluginHost, nameof(pluginHost));
            Assert.ArgumentNotNull(fileNames, nameof(fileNames));

            foreach (var folderDescriptor in pluginHost.GetPluginFolders())
            {
                GetAssembliesFromFolder(fileNames, folderDescriptor.Location);
            }
        }