Refactor to new class Checkbox() - fix unit tests

extension/Classes/Core/Form/Checkbox.php

@@ -37,7 +37,6 @@ class Checkbox {
      */
     private $store = null;
 
-
     /**
      * Checkbox constructor.
      * @throws \CodeException
@@ -48,6 +47,7 @@ class Checkbox {
 
         $this->store = Store::getInstance();
     }
+
     /**
      * Builds HTML 'checkbox' element.
      *
@@ -149,7 +149,7 @@ class Checkbox {
     }
 
     /**
-     * Build a Checkbox based on two values. Either in HTML plain layout or with Bootstrap Button class.
+     * Build a Multi Checkbox either in HTML plain layout or with Bootstrap Button class.
      *
      * @param array $formElement
      * @param string $htmlFormElementName