public abstract bool DoLoad(PluginUIType ui, PluginOSType os);
		public override bool DoLoad(PluginUIType ui, PluginOSType os) {
			return ui == PluginUIType.Gtk;
		}
		public override bool DoLoad(PluginUIType ui, PluginOSType os) {
			//return os == PluginOSType.Unix || os == PluginOSType.Windows || os == PluginOSType.Mac;
			OS = os;
			return true;
		}