/**
*
* Generates an image path. The mixin is required
* so that webpack for Storybook and the application can both
* generate the image path correctly.
*
* $image: the image file name, e.g. 'loading-ellipsis.svg'
*/
@function image-src($image) {
  @if variable-exists(environment) and $environment == 'storybook' {
    @return '../images/' + $image;
  } @else {
    @return image_path('loading-ellipsis.svg');
  }
}