public function getCell($columnKey, $rowKey)
    {
        $column = $this->getColumn($columnKey);
        $row    = $this->getRow($rowKey);

        return $row[$column];
    }
public function getCell($columnKey, $rowKey)
    {
        $column = $this->getColumn($columnKey);
        $row    = $this->getRow($rowKey);

        return $row[$column];
    }
public function getCell ( $ columnKey , $ rowKey ) { $ column = $ this -> getColumn ( $ columnKey ) ; $ row = $ this -> getRow ( $ rowKey ) ; return $ row [ $ column ] ; }
Gets the value of the cell or NULL if the cell does not exist.

@param mixed $columnKey
@param mixed $rowKey

@return mixed
@throws TypeMismatchException
Gets the value of the cell or NULL if the cell does not exist .