@function _radial-positions-parser($gradient-pos) {

$shape-size: nth($gradient-pos, 1);
$pos:        nth($gradient-pos, 2);
$shape-size-spec: _shape-size-stripper($shape-size);
$pre-spec: unquote(if($pos, "#{$pos}, ", null))
           unquote(if($shape-size, "#{$shape-size},", null));
$pos-spec: if($pos, "at #{$pos}", null);
$spec: "#{$shape-size-spec} #{$pos-spec}";
// Add comma
@if ($spec != '  ') {
  $spec: "#{$spec},"
}
@return $pre-spec $spec;

}