Something I wish I could do in Sass

sass-extend-or-include-wish

// ---------------------------------------
/*

## Set / Get

http://cdpn.io/hgLal


*/
// ---------------------------------------

$-fw-debug: false;
$-fw-default-inclusion: extend;
$-fw-mixins: ( init: true );

@mixin -fw-set ( $name, $debug: $-fw-debug ) {
  @if not map-has-key( $-fw-mixins, $name ) {
    // create placeholder
    %#{$name} {
      @content;
    }
    // create class of same name if debugging
    @if $debug {
      .#{$name} { @extend %#{$name}; }
    }
    // create mixin - still no way to do this
    // @mixin #{$name} {
    //  @content;
    // }
    $-fw-mixins: map-merge($-fw-mixins, ($name: true));
  }
} // -fw-set

@mixin -fw-get ( $name, $method: $-fw-default-inclusion ) { 
  @if map-has-key( $-fw-mixins, $name ) {
    // add styles as extend
    @if $method == extend {
      @extend %#{$name};
    } 
    // add styles as include - still no way to do this
    // @else {
    //    @include $name;
    // }
  }
} // -fw-get

@include -fw-set(test, true) {
  margin-bottom: 10px;
  padding: 10px;
  color: red;
  background: pink;
}

.extend { @include -fw-get(test, extend); }

.include { @include -fw-get(test, include); }