@classmethod<EOL><INDENT>def parse_results_header(cls, header):<DEDENT>
header = IORMetricsExtractor.RE_MULTIPLE_SPACES.sub('<STR_LIT:U+0020>', header)<EOL>header = header.split('<STR_LIT:U+0020>')<EOL>return header<EOL>
Extract columns from the line under "Summary of all tests:"

        :param header: content of the results header line
        :return: list of string providing columns