def _rows_date2int(self, rows):
for row in rows:<EOL><INDENT>if not self._date_type:<EOL><INDENT>self._date_type = self._get_date_type(row[self._key_start_date])<EOL><DEDENT>row[self._key_start_date] = self._date2int(row[self._key_start_date])<EOL>row[self._key_end_date] = self._date2int(row[self._key_end_date])<EOL><DEDENT>
Replaces start and end dates in a row set with their integer representation

:param list[dict[str,T]] rows: The list of rows.