code: public function add( $data )
  	{
  		$columnNum = 0;
  		$rowNum = $this->iterator->current()->getRowIndex();
  
  		foreach( (array) $data as $value ) {
  			$this->sheet->setCellValueByColumnAndRow( $columnNum++, $rowNum, $value );
  		}
  
  		$this->iterator->next();
  	}
docs: Adds a row to the content object.
  
  @param mixed $data Data to add