docs: def _parse_info(self, info_str, num_alts):
          """Parse INFO column from string"""
          result = OrderedDict()
          if info_str == ".":
              return result
          # The standard is very nice to parsers, we can simply split at
          # semicolon characters, although I (Manuel) don't know how strict
          # programs follow this
          for entry in info_str.split(";"):
              if "=" not in entry:  # flag
                  key = entry
                  result[key] = parse_field_value(self.header.get_info_field_info(key), True)
              else:
                  key, value = split_mapping(entry)
                  result[key] = parse_field_value(self.header.get_info_field_info(key), value)
              self._info_checker.run(key, result[key], num_alts)
          return result