public static IEnumerable <Plugin <T> > GetPlugins <T>(bool onlyEnabled)
            where T : IPlugin
        {
            IEnumerable <Plugin <T> > plugins = PluginsManagement.GetPlugins <T>();

            if (onlyEnabled)
            {
                plugins =
                    from item in plugins
                    where item.PluginInfo.Enable
                    select item;
            }
            return(plugins);
        }