/**
  * Share view with all sheets
  * @param  string $view
  * @param  array  $data
  * @param  array  $mergeData
  * @return  LaravelExcelWriter
  */
 public function shareView($view, $data = array(), $mergeData = array())
 {
     // Get the parser
     $this->getParser();
     // Set the view inside the parser
     $this->parser->setView($view);
     $this->parser->setData($data);
     $this->parser->setMergeData($mergeData);
     return $this;
 }
 /**
  * Add vars to the data array
  * @param string      $key
  * @param bool|string $value
  * @param null        $nullValue
  * @param bool|string $startCell
  * @param bool        $strictNullComparison
  * @throws PHPExcel_Exception
  * @return void|$this
  */
 protected function _addVars($key, $value = false, $nullValue = null, $startCell = 'A1', $strictNullComparison = false)
 {
     // Add array of data
     if (is_array($key) || $key instanceof Collection) {
         // Set the data
         $this->data = $this->addData($key);
         // Create excel from array without a view
         if (!$this->parser) {
             return $this->createSheetFromArray($this->data, $nullValue, $startCell, $strictNullComparison);
         }
     } else {
         $this->data[$key] = $value;
     }
     // Set data to parser
     if ($this->parser) {
         $this->parser->setData($this->data);
     }
 }