tube-status-server/stylesheets/bourbon/functions/_render-gradients.scss

// User for linear and radial gradients within background-image or border-image properties

@function render-gradients($gradients, $gradient-type, $vendor: false) {
  $vendor-gradients: false;
  @if $vendor {
    $vendor-gradients: -#{$vendor}-#{$gradient-type}-gradient($gradients);
  }

  @else if $vendor == false {
    $vendor-gradients: "#{$gradient-type}-gradient(#{$gradients})";
    $vendor-gradients: unquote($vendor-gradients);
  }
  @return $vendor-gradients;
}