fix stan

Author: mvorisek

src/Accordion.php

@@ -136,11 +136,9 @@ public function jsBehavior($behavior, array $args, $when = null)
     /**
      * Return the index of an accordion section in collection.
      *
-     * @param AccordionSection $section
-     *
      * @return int
      */
-    public function getSectionIdx($section)
+    public function getSectionIdx(AccordionSection $section)
     {
         $idx = -1;
         foreach ($this->sections as $key => $accordion_section) {

src/Form/Layout/Section/Accordion.php

@@ -53,4 +53,12 @@ public function addSection($title, \Closure $callback = null, $icon = 'dropdown'
 
         return $section->add([$this->formLayout, 'form' => $this->form]);
     }
+
+    /**
+     * @param AccordionSection|Form\Layout $section
+     */
+    public function getSectionIdx($section)
+    {
+        return parent::getSectionIdx($section instanceof AccordionSection ? $section : $section->getOwner());
+    }
 }