docs: def _parse_interval(self, tokens):
          """ Parses a range
           Range ::= <num> | <num> ('..' | '^') <num>
          """
          fr = int(tokens.pop(0)) - 1
          if len(tokens) > 1 and tokens[0] in ['..', '^']:
              tokens.pop(0)  # Pop '..' | '^'
              to = int(tokens.pop(0))
              return GenomicInterval(fr, to, chromosome=self.hdr['ACCESSION']['value'])
          return GenomicInterval(fr, fr + 1, chromosome=self.hdr['ACCESSION']['value'])