是否有可能在sass中重载mixins？

@mixin example($value) {
  @if type-of($value) == 'number' {
    width: $value;
  } @else if type-of($value) == 'string' {
    color: $value;
  }
}

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

.class1 {
  @include example(10px);
}

.class2 {
  @include example(#ff0000);
}

.class3 {
  @include example(10px, 20px);
}