code: public function insertNewRowBefore($pBefore, $pNumRows = 1)
      {
          if ($pBefore >= 1) {
              $objReferenceHelper = ReferenceHelper::getInstance();
              $objReferenceHelper->insertNewBefore('A' . $pBefore, 0, $pNumRows, $this);
          } else {
              throw new Exception('Rows can only be inserted before at least row 1.');
          }
  
          return $this;
      }
docs: Insert a new row, updating all possible related data.
  
  @param int $pBefore Insert before this one
  @param int $pNumRows Number of rows to insert
  
  @throws Exception
  
  @return Worksheet