=set-experimental-support($moz: false, $webkit: false, $ms: false, $o: false, $khtml: false)
  $experimental-support-for-mozilla: $moz
  $experimental-support-for-webkit: $webkit
  $experimental-support-for-microsoft: $ms
  $experimental-support-for-opera: $o
  $experimental-support-for-khtml: $khtml

=with-only-support-for($moz: false, $webkit: false, $ms: false, $o: false, $khtml: false)
  // Capture the current state
  $original-moz: $experimental-support-for-mozilla
  $original-webkit: $experimental-support-for-webkit
  $original-o: $experimental-support-for-opera
  $original-ms: $experimental-support-for-microsoft
  $original-khtml: $experimental-support-for-khtml
  +set-experimental-support($moz, $webkit, $ms, $o, $khtml)
  @content
  +set-experimental-support($original-moz, $original-webkit, $original-ms, $original-o, $original-khtml)