website/docs/latest/_sass/bootstrap/mixins/_size.scss - distributedlog - Git at Google

 // Sizing shortcuts

 @mixin size($width, $height) {
   width: $width;
   height: $height;
 }

 @mixin square($size) {
   @include size($size, $size);
 }
	// Sizing shortcuts

	@mixin size($width, $height) {
	width: $width;
	height: $height;
	}

	@mixin square($size) {
	@include size($size, $size);
	}