private function getRowXml($columnCount, $cellXml)
    {
        return sprintf(RowXml::DEFAULT_XML, $this->rowIndex++, $columnCount, $cellXml);
    }
private function getRowXml($columnCount, $cellXml)
    {
        return sprintf(RowXml::DEFAULT_XML, $this->rowIndex++, $columnCount, $cellXml);
    }
private function getRowXml ( $ columnCount , $ cellXml ) { return sprintf ( RowXml :: DEFAULT_XML , $ this -> rowIndex ++ , $ columnCount , $ cellXml ) ; }
Build and return xml string for single row.

@param int    $columnCount
@param string $cellXml
@return string
Build and return xml string for single row .