upgrade

main/exercise/HotSpotCombination.php

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+<?php
+/* For licensing terms, see /license.txt */
+
+/**
+ * HotSpotCombination.
+ */
+class HotSpotCombination extends HotSpot
+{
+    public $typePicture = 'hotspot_co.png';
+    public $explanationLangVar = 'HotSpotCombination';
+
+    /**
+     * HotSpot constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+        $this->type = HOT_SPOT_COMBINATION;
+    }
+}