Parse and extract all meta data by looping through the dictionary of meta_info regexs

        updates self.meta_info

        Args:
             line (str): line of the msp file

def _parse_meta_info(self, line):
        """Parse and extract all meta data by looping through the dictionary of meta_info regexs

        updates self.meta_info

        Args:
             line (str): line of the msp file
        """
        if self.mslevel:
            self.meta_info['ms_level'] = self.mslevel

        if self.polarity:
            self.meta_info['polarity'] = self.polarity

        for k, regexes in six.iteritems(self.meta_regex):
            for reg in regexes:

                m = re.search(reg, line, re.IGNORECASE)

                if m:
                    self.meta_info[k] = m.group(1).strip()