Update Sheet.php

add the set and get function of the merge ranging

src/Spout/Writer/Common/Entity/Sheet.php

@@ -27,6 +27,9 @@ class Sheet
     /** @var SheetManager Sheet manager */
     private $sheetManager;
 
+    /** @var $mergeRanges merge cell */
+    private $mergeRanges;
+    
     /**
      * @param int $sheetIndex Index of the sheet, based on order in the workbook (zero-based)
      * @param string $associatedWorkbookId ID of the sheet's associated workbook
@@ -108,4 +111,22 @@ class Sheet
 
         return $this;
     }
+    
+    /**
+     * @return merge 
+     */ 
+    public function getMergeRanges()
+    {
+        return $this->mergeRanges;
+    }
+
+    /**
+     * @param $mergeRanges
+     * @return mixed
+     */
+    public function setMergeRanges($mergeRanges)
+    {
+        return $this->mergeRanges = $mergeRanges;
+    }
+    
 }