/**
 * function: z-index
 *
 * uses map $crispy__z-index to get value by key 
 *
 * @author Björn Hase
 *
 */

@function zIndex($name) {
    @if has-key($crispy__z-index, $name) {
        @return map-get($crispy__z-index, $name);
    } @else {
        @warn 'There is no item "#{$name}" in this list; choose one of: #{$crispy__z-index}';
        @return null;
    }
}