docs: def _parse_spectra_annotation(self, line):
          """Parse and store the spectral annotation details
          """
          if re.match('^PK\$NUM_PEAK(.*)', line, re.IGNORECASE):
              self.start_spectra_annotation = False
              return
  
          saplist = line.split()
  
          sarow = (
              self.current_id_spectra_annotation,
              float(saplist[self.spectra_annotation_indexes['m/z']]) if 'm/z' in self.spectra_annotation_indexes else None,
              saplist[self.spectra_annotation_indexes[
                  'tentative_formula']] if 'tentative_formula' in self.spectra_annotation_indexes else None,
              float(saplist[self.spectra_annotation_indexes[
                  'mass_error(ppm)']]) if 'mass_error(ppm)' in self.spectra_annotation_indexes else None,
              self.current_id_meta)
  
          self.spectra_annotation_all.append(sarow)
  
          self.current_id_spectra_annotation += 1