Correction on isVisible variable name

src/Spout/Reader/XLSX/Sheet.php

@@ -32,6 +32,7 @@ class Sheet implements SheetInterface
      * @param string $sheetDataXMLFilePath Path of the sheet data XML file as in [Content_Types].xml
      * @param int $sheetIndex Index of the sheet, based on order in the workbook (zero-based)
      * @param string $sheetName Name of the sheet
+     * @param bool $isSheetVisible Whether the sheet is visible or not
      * @param bool $isSheetActive Whether the sheet was defined as active
      * @param \Box\Spout\Reader\XLSX\ReaderOptions $options Reader's current options
      * @param Helper\SharedStringsHelper Helper to work with shared strings

src/Spout/Writer/Common/Sheet.php

@@ -88,9 +88,9 @@ class Sheet
      * @param string $visibility Visibility of the sheet
      * @return Sheet
      */
-    public function setIsVisible($visibility = true)
+    public function setIsVisible($isVisible = true)
     {
-        $this->isVisible = $visibility;
+        $this->isVisible = $isVisible;
 
         return $this;
     }