_sass/vendor/bourbon/css3/_filter.scss - incubator-ariatosca-website - Git at Google

 @mixin filter($function: none) {
   // <filter-function> [<filter-function]* | none
   @include prefixer(filter, $function, webkit spec);
 }
	@mixin filter($function: none) {
	// <filter-function> [<filter-function]* \| none
	@include prefixer(filter, $function, webkit spec);
	}