@function kf-reverse($animation-map) {
  $animation-map: _normalize-map-hierarchy($animation-map, tepv);
  $length: _calculate-animation-length($animation-map);

  $seperated: _kf-properties-extractor($animation-map);
  $anim-map: nth($seperated, 1);
  $prop-map: nth($seperated, 2);

  $return-map: ();
  @each $m, $epv in $anim-map {
    $m: abs($m + -$length);
    $return-map: map-merge($return-map, ($m: $epv));
  }

  @return map-merge($return-map, $prop-map);
}

@mixin kf-reverse($m...) {
  @include kf(kf-reverse($m...));
}