code: def _get_xlsx_kws(self, **kws_usr):
          
          kws_xlsx = {'fld2col_widths':self._get_fld2col_widths(**kws_usr), 'items':'GO IDs'}
          remaining_keys = set(['title', 'hdrs', 'prt_flds', 'fld2fmt',
                                'ntval2wbfmtdict', 'ntfld_wbfmt'])
          for usr_key, usr_val in kws_usr.items():
              if usr_key in remaining_keys:
                  kws_xlsx[usr_key] = usr_val
          return kws_xlsx
docs: Return keyword arguments relevant to writing an xlsx.