/*
---
name: z-index(name)
category: Foundations/Mixins
tag: function
---
Get the z-index from the available layer positions:

```scss
.base {
  z-index: z-index('base');
}
.above {
  z-index: z-index('above');
}
```
*/
@function z-index($name: 'base') {
  @if map-has-key($z-index, $name) {
    @return map-get($z-index, $name);
  } @else {
    @warn "We didn't find the z-index called #{$name}. Please check available values";
    @return map-get($z-index, 'base');
  }
}