def show_layer_style_list(self, layer_obj):
        print('Show layer styles')
        if not layer_obj.__class__.__name__ == 'Layer':
            print ('not a layer', type(layer_obj))
            return

        sl = [layer_obj.default_style.name]
        for s in layer_obj._get_alternate_styles():
           sl.append(s.name)
        for idx, sname in enumerate(sl):
            if idx == 0:
                print('%s (default)' % sname)
                continue
            print (sname)