diff --git a/js/checkbox-widget.js b/js/checkbox-widget.js
index 821424e..997aaca 100644
--- a/js/checkbox-widget.js
+++ b/js/checkbox-widget.js
@@ -51,8 +51,7 @@
   };
 
   /**
-   * Disable all facet links and checkboxes in the facet and apply a 'disabled'
-   * class.
+   * Disable all facet checkboxes in the facet and apply a 'disabled' class.
    */
   Drupal.facets.disableFacet = function ($facet) {
     $facet.addClass('facets-disabled');
diff --git a/src/Plugin/facets/widget/CheckboxWidget.php b/src/Plugin/facets/widget/CheckboxWidget.php
index a9f82a9..b22b4aa 100644
--- a/src/Plugin/facets/widget/CheckboxWidget.php
+++ b/src/Plugin/facets/widget/CheckboxWidget.php
@@ -2,13 +2,8 @@
 
 namespace Drupal\facets\Plugin\facets\widget;
 
-use Drupal\Core\Form\FormStateInterface;
-use Drupal\Core\Link;
-use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Drupal\facets\FacetInterface;
-use Drupal\facets\Form\CheckboxWidgetForm;
 use Drupal\facets\Result\ResultInterface;
-use Drupal\facets\Widget\WidgetInterface;
 
 /**
  * The checkbox / radios widget.
@@ -22,6 +17,8 @@ use Drupal\facets\Widget\WidgetInterface;
 class CheckboxWidget extends LinksWidget {
 
   /**
+   * The facet the widget is being built for.
+   *
    * @var \Drupal\facets\FacetInterface
    */
   protected $facet;
@@ -61,6 +58,7 @@ class CheckboxWidget extends LinksWidget {
       ],
     ];
     $build['#attached']['library'][] = 'facets/drupal.facets.checkbox-widget';
+
     return $build;
   }
 
@@ -72,4 +70,5 @@ class CheckboxWidget extends LinksWidget {
     $items['#attributes']['data-facet-id'] = $this->facet->getUrlAlias() . '-' . $result->getRawValue();
     return $items;
   }
+
 }
diff --git a/tests/src/Unit/Plugin/widget/CheckboxWidgetTest.php b/tests/src/Unit/Plugin/widget/CheckboxWidgetTest.php
index dcd8031..8fc63da 100644
--- a/tests/src/Unit/Plugin/widget/CheckboxWidgetTest.php
+++ b/tests/src/Unit/Plugin/widget/CheckboxWidgetTest.php
@@ -85,7 +85,7 @@ class CheckboxWidgetTest extends UnitTestCase {
   /**
    * Build a formattable markup object to use in the other tests.
    *
-   * @param $text
+   * @param string $text
    *   Text to display.
    * @param int $count
    *   Number of results.