Created by: Bartmax
The idea behind this is to let someone use more panel to extend existing ones like :
@panel-clear-border : #ccc;
@panel-clear-text : #333;
@panel-clear-heading-bg : #fff;
@panel-clear-body-bg: #fafafa;
.panel-clear {
.panel-variant(@panel-clear-border;
@panel-clear-text;
@panel-clear-heading-bg;
@panel-clear-border;
@panel-clear-body-bg);
}