docs: def _parse_region(self, rec, line_iter):
          """Parse a section of an ISA-Tab, assigning information to a supplied record.
          """
          had_info = False
          keyvals, section = self._parse_keyvals(line_iter)
  
          if keyvals:
              rec.metadata = keyvals[0]
          while section and section[0] != "STUDY":
              had_info = True
              keyvals, next_section = self._parse_keyvals(line_iter)
              attr_name = self._sections[section[0]]
              if attr_name in self._nolist:
                  try:
                      keyvals = keyvals[0]
                  except IndexError:
                      keyvals = {}
  
              setattr(rec, attr_name, keyvals)
              section = next_section
          return rec, had_info