* Reads a line from CSV file and returns it as an indexed array
*
* @param $columnSeparator Character to use separting columns
+ * @param $expectedMatches Expected matches, 0 is default and means flexible
* @return $lineArray An index array with the read line
+ * @throws InvalidArgumentException If a parameter is invalid
*/
- function readCsvFileLine (string $columnSeparator);
+ function readCsvFileLine (string $columnSeparator, int $expectedMatches = 0);
}