Better Sass through Susy with-layout mixin

_get-layout.scss

// Get Layout
// ----------
// Return a new layout based on current and given settings
// - $layout: <settings>
// - $clean: boolean
@function _get-layout(
  $layout,
  $clean: false
) {
  $layout: layout($layout);
  @return if($clean, $layout, _susy-deep-merge($susy, $layout));
}

susy-inspect.scss

// Susy Inspect
// ------------
// Output arguments passed to a inspect.
// - $mixin  : <susy mixin>
// - $inspec   : <mixin arguments>

@mixin susy-inspect($mixin, $inspect...) {
  $show: false;

  @each $item in $inspect {
    @if index($item, inspect) {
      $show: true;
    }
  }

  @if $show or susy-get(debug inspect) {
    -susy-#{$mixin}: inspect($inspect);
  }
}

with-layout.scss

// Use Grid
// --------
// Use an arbitrary layout for a section of code
// - $layout: <settings>
// - $clean: boolean
@mixin with-layout(
  $layout,
  $clean: false
) {
  $inspect  : $layout;
  $old      : $susy;
  $susy     : _get-layout($layout, $clean) !global;

  @include susy-inspect(with-layout, $inspect);

  @content;

  $susy: $old !global;
}